diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..a22ad86
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,70 @@
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -2
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlinesLeft: true
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: false
+BinPackParameters: false
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Stroustrup
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+ColumnLimit:     80
+CommentPragmas:  '^ IWYU pragma:'
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+IncludeCategories:
+  - Regex:           '^<opentracing-c/'
+    Priority:        2
+  - Regex:           '^<'
+    Priority:        1
+IndentCaseLabels: false
+IndentWidth:     4
+IndentWrappedFunctionNames: false
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+ReflowComments:  true
+SortIncludes:    true
+SpaceAfterCStyleCast: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        C++03
+TabWidth:        8
+UseTab:          Never
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..89ee0ff
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,24 @@
+Checks:          '*,-llvm-header-guard,-clang-diagnostic-unused-command-line-argument'
+HeaderFilterRegex: '.*'
+AnalyzeTemporaryDtors: false
+CheckOptions:
+  - key:             google-readability-braces-around-statements.ShortStatementLines
+    value:           '1'
+  - key:             google-readability-function-size.StatementThreshold
+    value:           '800'
+  - key:             google-readability-namespace-comments.ShortNamespaceLines
+    value:           '10'
+  - key:             google-readability-namespace-comments.SpacesBeforeComments
+    value:           '2'
+  - key:             modernize-loop-convert.MaxCopySize
+    value:           '16'
+  - key:             modernize-loop-convert.MinConfidence
+    value:           reasonable
+  - key:             modernize-loop-convert.NamingStyle
+    value:           CamelCase
+  - key:             modernize-pass-by-value.IncludeStyle
+    value:           llvm
+  - key:             modernize-replace-auto-ptr.IncludeStyle
+    value:           llvm
+  - key:             modernize-use-nullptr.NullMacros
+    value:           'NULL'
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..f1ac412
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,138 @@
+language: c
+sudo: false
+dist: trusty
+addons:
+  apt:
+    packages: &1
+    - lcov
+    - valgrind
+    - doxygen
+matrix:
+  include:
+  - os: linux
+    addons:
+      apt:
+        packages:
+        - *1
+        - g++-4.8
+    env:
+    - MATRIX_EVAL="CC=gcc-4.8 && CXX=g++-4.8"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        packages:
+        - *1
+        - g++-4.9
+    env:
+    - MATRIX_EVAL="CC=gcc-4.9 && CXX=g++-4.9"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        packages:
+        - *1
+        - g++-5
+    env:
+    - MATRIX_EVAL="CC=gcc-5 && CXX=g++-5"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        packages:
+        - *1
+        - g++-6
+    env:
+    - MATRIX_EVAL="CC=gcc-6 && CXX=g++-6"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        packages:
+        - *1
+        - g++-7
+    env:
+    - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - llvm-toolchain-precise-3.6
+        packages:
+        - *1
+        - clang-3.6
+    env:
+    - MATRIX_EVAL="CC=clang-3.6 && CXX=clang++-3.6"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - llvm-toolchain-precise-3.7
+        packages:
+        - *1
+        - clang-3.7
+    env:
+    - MATRIX_EVAL="CC=clang-3.7 && CXX=clang++-3.7"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - llvm-toolchain-precise-3.8
+        packages:
+        - *1
+        - clang-3.8
+    env:
+    - MATRIX_EVAL="CC=clang-3.8 && CXX=clang++-3.8"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - llvm-toolchain-trusty-4.0
+        packages:
+        - *1
+        - clang-4.0
+    env:
+    - MATRIX_EVAL="CC=clang-4.0 && CXX=clang++-4.0"
+  - os: linux
+    addons:
+      apt:
+        sources:
+        - llvm-toolchain-trusty-5.0
+        packages:
+        - *1
+        - clang-5.0
+    env:
+    - MATRIX_EVAL="CC=clang-5.0 && CXX=clang++-5.0"
+branches:
+  only:
+  - master
+cache:
+  directories:
+  - $HOME/install
+before_install:
+- eval "${MATRIX_EVAL}"
+- ./scripts/install-deps.sh "$HOME/install"
+script:
+- ./scripts/build.sh "$HOME/install"
+after_success:
+- ./scripts/upload-coverage.sh
+- ./scripts/generate-doc.sh && touch build/doc/Debug/html/.nojekyll
+deploy:
+  provider: pages
+  skip-cleanup: true
+  github-token: $GITHUB_TOKEN
+  keep-history: true
+  local-dir: build/doc/Debug/html
+env:
+  global:
+  - LANG="en_US.UTF-8"
+  - PATH="$HOME/install/bin:$PATH"
+  - COVERAGE="ON"
+  - secure: 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
diff --git a/.ycm_extra_conf.py b/.ycm_extra_conf.py
new file mode 100644
index 0000000..c697a77
--- /dev/null
+++ b/.ycm_extra_conf.py
@@ -0,0 +1,93 @@
+# Copyright (c) 2018, Uber Technologies, Inc
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import os
+import ycm_core
+
+
+def DirectoryOfThisScript():
+  return os.path.dirname( os.path.abspath( __file__ ) )
+
+
+project_dir = DirectoryOfThisScript()
+
+flags = [
+'-Wall',
+'-Werror',
+'-pedantic',
+'-std=ansi',
+'-pthread',
+'-x',
+'c',
+'-isystem',
+'/usr/local/include',
+'-I',
+os.path.join(project_dir, 'src'),
+'-I',
+os.path.join(project_dir, 'build/src')
+]
+
+compilation_database_folder = os.path.join(project_dir, 'build')
+
+if os.path.exists( compilation_database_folder ):
+  database = ycm_core.CompilationDatabase( compilation_database_folder )
+else:
+  database = None
+
+SOURCE_EXTENSIONS = [ '.cpp', '.cxx', '.cc', '.c', '.m', '.mm' ]
+
+
+def IsHeaderFile( filename ):
+  extension = os.path.splitext( filename )[ 1 ]
+  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
+
+
+def GetCompilationInfoForFile( filename ):
+  # The compilation_commands.json file generated by CMake does not have entries
+  # for header files. So we do our best by asking the db for flags for a
+  # corresponding source file, if any. If one exists, the flags for that file
+  # should be good enough.
+  if IsHeaderFile( filename ):
+    basename = os.path.splitext( filename )[ 0 ]
+    for extension in SOURCE_EXTENSIONS:
+      replacement_file = basename + extension
+      if os.path.exists( replacement_file ):
+        compilation_info = database.GetCompilationInfoForFile(
+          replacement_file )
+        if compilation_info.compiler_flags_:
+          return compilation_info
+    return None
+  return database.GetCompilationInfoForFile( filename )
+
+
+def FlagsForFile( filename, **kwargs ):
+  if not database:
+    return {
+      'flags': flags,
+      'include_paths_relative_to_dir': DirectoryOfThisScript()
+    }
+
+  compilation_info = GetCompilationInfoForFile( filename )
+  if not compilation_info:
+    return None
+
+  # Bear in mind that compilation_info.compiler_flags_ does NOT return a
+  # python list, but a "list-like" StringVec object.
+  final_flags = list( compilation_info.compiler_flags_ )
+
+  return {
+    'flags': final_flags,
+    'include_paths_relative_to_dir': compilation_info.compiler_working_dir_
+  }
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..0c0eb39
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,237 @@
+cmake_minimum_required(VERSION 3.1)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+set(CMAKE_TOOLCHAIN_FILE "${CMAKE_CURRENT_SOURCE_DIR}/cmake/toolchain.cmake"
+    CACHE FILEPATH "Toolchain to use for building this package")
+
+project(opentracing-c VERSION 0.0.1)
+
+include(CheckCCompilerFlag)
+include(CheckIncludeFile)
+include(CheckTypeSize)
+include(CMakeDependentOption)
+include(CTest)
+include(GenerateExportHeader)
+
+include(CheckAttributes)
+include(GenerateDocumentation)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+function(add_c_flag flags_var new_flag)
+  string(MAKE_C_IDENTIFIER "have${new_flag}" new_flag_var)
+  check_c_compiler_flag(${new_flag} ${new_flag_var})
+  if(${new_flag_var})
+    set(${flags_var} ${${flags_var}} ${new_flag} PARENT_SCOPE)
+  endif()
+endfunction()
+
+add_c_flag(flags "-Wc++-compat")
+add_c_flag(flags "-Werror")
+add_c_flag(flags "-pedantic")
+if("${CMAKE_C_COMPILER}" MATCHES "Clang")
+  add_c_flag(flags "-Weverything")
+else()
+  add_c_flag(flags "-Wall")
+  add_c_flag(flags "-Wextra")
+endif()
+
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(debug_build ON)
+endif()
+cmake_dependent_option(OPENTRACINGC_COVERAGE "Enable code coverage" OFF
+                       "BUILD_TESTING;debug_build" OFF)
+if(OPENTRACINGC_COVERAGE)
+  include(CodeCoverage)
+  append_coverage_compiler_flags(coverage_flags)
+  string(REPLACE " " ";" coverage_flags "${coverage_flags}")
+  set(COVERAGE_EXCLUDES "test/*")
+endif()
+
+set(srcs
+  "src/opentracing-c/common.h"
+  "src/opentracing-c/destructible.h"
+  "src/opentracing-c/dynamic_load.c"
+  "src/opentracing-c/dynamic_load.h"
+  "src/opentracing-c/propagation.h"
+  "src/opentracing-c/span.h"
+  "src/opentracing-c/tracer.c"
+  "src/opentracing-c/tracer.h"
+  "src/opentracing-c/value.h")
+
+add_library(opentracingc-static STATIC ${srcs})
+add_library(opentracingc SHARED ${srcs})
+generate_export_header(opentracingc
+  EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/src/opentracing-c/visibility.h")
+set_target_properties(opentracingc-static PROPERTIES
+  OUTPUT_NAME opentracingc
+  COMPILE_DEFINITIONS OPENTRACINGC_STATIC_DEFINE)
+set_target_properties(opentracingc PROPERTIES
+  C_VISIBILITY_INLINES hidden
+  C_VISIBILITY_PRESET hidden)
+
+check_include_file("sys/time.h" HAVE_SYS_TIME_H)
+check_type_size("struct timespec" OPENTRACINGC_USE_TIMESPEC)
+
+check_attributes()
+
+configure_file(
+  "${CMAKE_CURRENT_SOURCE_DIR}/src/opentracing-c/config.h.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/src/opentracing-c/config.h" @ONLY)
+
+foreach(lib opentracingc opentracingc-static)
+  target_include_directories(${lib} PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/src>)
+  target_compile_options(${lib} PRIVATE ${flags})
+
+  if(OPENTRACINGC_HAVE_WEAK_SYMBOLS)
+    target_link_libraries(${lib} PUBLIC dl)
+  endif()
+endforeach()
+
+option(OPENTRACINGC_LINT "Run clang-tidy on source files" ON)
+find_program(CLANG_TIDY_PATH "clang-tidy")
+cmake_dependent_option(
+    OPENTRACINGC_LINT
+    "Enable running clang-tidy on sources during compilation"
+    ON
+    "CLANG_TIDY_PATH"
+    OFF)
+if(OPENTRACINGC_LINT)
+    set_target_properties(opentracingc PROPERTIES
+      C_CLANG_TIDY "${CLANG_TIDY_PATH}")
+endif()
+
+if(BUILD_TESTING)
+  set(test_src
+    "test/dynamic_load_test.c"
+    "test/tracer_test.c")
+
+  foreach(test_case_src ${test_src})
+    get_filename_component(test_component ${test_case_src} NAME_WE)
+    add_executable(${test_component} "${test_case_src}")
+    target_link_libraries(${test_component} PUBLIC opentracingc-static)
+    add_test(${test_component} ${test_component})
+    list(APPEND test_executables ${test_component})
+  endforeach()
+
+  if(OPENTRACINGC_HAVE_WEAK_SYMBOLS)
+    add_library(mock_tracing_lib SHARED "test/mock_tracing_lib.c")
+    target_compile_definitions(mock_tracing_lib PRIVATE DEFINE_HOOK)
+    target_link_libraries(mock_tracing_lib PUBLIC opentracingc)
+
+    add_library(mock_tracing_lib_no_hook SHARED "test/mock_tracing_lib.c")
+    target_link_libraries(mock_tracing_lib_no_hook PUBLIC opentracingc)
+
+    add_library(mock_tracing_lib_bad_version SHARED "test/mock_tracing_lib.c")
+    target_compile_definitions(mock_tracing_lib_bad_version PRIVATE
+      BAD_VERSION DEFINE_HOOK)
+    target_link_libraries(mock_tracing_lib_bad_version PUBLIC opentracingc)
+
+    add_library(mock_tracing_lib_hook_return_null SHARED
+      "test/mock_tracing_lib.c")
+    target_compile_definitions(mock_tracing_lib_hook_return_null PRIVATE
+      RETURN_NULL_NO_ERROR DEFINE_HOOK)
+    target_link_libraries(mock_tracing_lib_hook_return_null PUBLIC opentracingc)
+
+    file(GENERATE
+      OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/test/mock_tracing_lib_names.h"
+      INPUT "${CMAKE_CURRENT_SOURCE_DIR}/test/mock_tracing_lib_names.h.in")
+
+    target_include_directories(dynamic_load_test PUBLIC
+      "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/test")
+  endif()
+
+  if(OPENTRACINGC_COVERAGE)
+    target_compile_options(opentracingc-static PRIVATE ${coverage_flags})
+    setup_target_for_coverage(NAME unit_test_coverage EXECUTABLE ${test_executables})
+  endif()
+endif()
+
+generate_documentation()
+
+# Installation (https://github.com/forexample/package-example)
+
+# Layout. This works for all platforms:
+#   * <prefix>/lib/cmake/<PROJECT-NAME>
+#   * <prefix>/lib/
+#   * <prefix>/include/
+set(config_install_dir "lib/cmake/${PROJECT_NAME}")
+set(include_install_dir "include")
+
+set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
+
+# Configuration
+set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
+set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
+set(TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
+set(namespace "${PROJECT_NAME}::")
+
+# Include module with fuction 'write_basic_package_version_file'
+include(CMakePackageConfigHelpers)
+
+# Configure '<PROJECT-NAME>ConfigVersion.cmake'
+# Use:
+#   * PROJECT_VERSION
+write_basic_package_version_file(
+    "${version_config}" COMPATIBILITY SameMajorVersion
+)
+
+# Configure '<PROJECT-NAME>Config.cmake'
+# Use variables:
+#   * TARGETS_EXPORT_NAME
+#   * PROJECT_NAME
+configure_package_config_file(
+    "cmake/Config.cmake.in"
+    "${project_config}"
+    INSTALL_DESTINATION "${config_install_dir}"
+)
+
+# Targets:
+#   * <prefix>/lib/libopentracingc.so
+#   * <prefix>/lib/libopentracingc.a
+#   * header location after install: <prefix>/include/opentracing-c/tracer.h
+#   * headers can be included by C++ code `#include <opentracing-c/tracer.h>`
+install(
+    TARGETS opentracingc opentracingc-static
+    EXPORT "${TARGETS_EXPORT_NAME}"
+    LIBRARY DESTINATION "lib"
+    ARCHIVE DESTINATION "lib"
+    RUNTIME DESTINATION "bin"
+    INCLUDES DESTINATION "${include_install_dir}"
+)
+
+# Headers:
+#   * src/opentracing-c/tracer.h -> <prefix>/include/src/tracer.h
+install(
+    DIRECTORY "src/opentracing-c"
+    DESTINATION "${include_install_dir}"
+    FILES_MATCHING PATTERN "*.h"
+)
+
+# Generated headers:
+#   * ${CMAKE_CURRENT_BINARY_DIR}/.../opentracing-c/config.h ->
+#     <prefix>/include/opentracing-c/config.h
+install(
+    DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/src/opentracing-c"
+    DESTINATION "${include_install_dir}"
+    FILES_MATCHING PATTERN "*.h"
+)
+
+# Config
+#   * <prefix>/lib/cmake/opentracing-c/opentracing-cConfig.cmake
+#   * <prefix>/lib/cmake/opentracing-c/opentracing-cConfigVersion.cmake
+install(
+    FILES "${project_config}" "${version_config}"
+    DESTINATION "${config_install_dir}"
+)
+
+# Config
+#   * <prefix>/lib/cmake/opentracing-c/opentracing-cTargets.cmake
+install(
+    EXPORT "${TARGETS_EXPORT_NAME}"
+    NAMESPACE "${namespace}"
+    DESTINATION "${config_install_dir}"
+)
diff --git a/Doxyfile.in b/Doxyfile.in
new file mode 100644
index 0000000..5b53c41
--- /dev/null
+++ b/Doxyfile.in
@@ -0,0 +1,2522 @@
+# Doxyfile 1.8.15
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project.
+#
+# All text after a double hash (##) is considered a comment and is placed in
+# front of the TAG it is preceding.
+#
+# All text after a single hash (#) is considered a comment and will be ignored.
+# The format is:
+# TAG = value [value, ...]
+# For lists, items can also be appended using:
+# TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (\" \").
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# This tag specifies the encoding used for all characters in the config file
+# that follow. The default is UTF-8 which is also the encoding used for all text
+# before the first occurrence of this tag. Doxygen uses libiconv (or the iconv
+# built into libc) for the transcoding. See
+# https://www.gnu.org/software/libiconv/ for the list of possible encodings.
+# The default value is: UTF-8.
+
+DOXYFILE_ENCODING      = UTF-8
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by
+# double-quotes, unless you are using Doxywizard) that should identify the
+# project for which the documentation is generated. This name is used in the
+# title of most generated pages and in a few other places.
+# The default value is: My Project.
+
+PROJECT_NAME           = @PROJECT_NAME@
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. This
+# could be handy for archiving the generated documentation or if some version
+# control system is used.
+
+PROJECT_NUMBER         =
+
+# Using the PROJECT_BRIEF tag one can provide an optional one line description
+# for a project that appears at the top of each page and should give viewer a
+# quick idea about the purpose of the project. Keep the description short.
+
+PROJECT_BRIEF          = "OpenTracing C API"
+
+# With the PROJECT_LOGO tag one can specify a logo or an icon that is included
+# in the documentation. The maximum height of the logo should not exceed 55
+# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
+# the logo to the output directory.
+
+PROJECT_LOGO           =
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
+# into which the generated documentation will be written. If a relative path is
+# entered, it will be relative to the location where doxygen was started. If
+# left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       = @doxygen_out_path@
+
+# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
+# directories (in 2 levels) under the output directory of each output format and
+# will distribute the generated files over these directories. Enabling this
+# option can be useful when feeding doxygen a huge amount of source files, where
+# putting all generated files in the same directory would otherwise causes
+# performance problems for the file system.
+# The default value is: NO.
+
+CREATE_SUBDIRS         = NO
+
+# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
+# characters to appear in the names of generated files. If set to NO, non-ASCII
+# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode
+# U+3044.
+# The default value is: NO.
+
+ALLOW_UNICODE_NAMES    = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all
+# documentation generated by doxygen is written. Doxygen will use this
+# information to generate all constant output in the proper language.
+# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese,
+# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States),
+# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian,
+# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages),
+# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian,
+# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian,
+# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish,
+# Ukrainian and Vietnamese.
+# The default value is: English.
+
+OUTPUT_LANGUAGE        = English
+
+# The OUTPUT_TEXT_DIRECTION tag is used to specify the direction in which all
+# documentation generated by doxygen is written. Doxygen will use this
+# information to generate all generated output in the proper direction.
+# Possible values are: None, LTR, RTL and Context.
+# The default value is: None.
+
+OUTPUT_TEXT_DIRECTION  = None
+
+# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member
+# descriptions after the members that are listed in the file and class
+# documentation (similar to Javadoc). Set to NO to disable this.
+# The default value is: YES.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
+# description of a member or function before the detailed description
+#
+# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
+# brief descriptions will be completely suppressed.
+# The default value is: YES.
+
+REPEAT_BRIEF           = YES
+
+# This tag implements a quasi-intelligent brief description abbreviator that is
+# used to form the text in various listings. Each string in this list, if found
+# as the leading text of the brief description, will be stripped from the text
+# and the result, after processing the whole list, is used as the annotated
+# text. Otherwise, the brief description is used as-is. If left blank, the
+# following values are used ($name is automatically replaced with the name of
+# the entity):The $name class, The $name widget, The $name file, is, provides,
+# specifies, contains, represents, a, an and the.
+
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
+# doxygen will generate a detailed section even if there is only a brief
+# description.
+# The default value is: NO.
+
+ALWAYS_DETAILED_SEC    = NO
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
+# inherited members of a class in the documentation of that class as if those
+# members were ordinary class members. Constructors, destructors and assignment
+# operators of the base classes will not be shown.
+# The default value is: NO.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path
+# before files name in the file list and in the header files. If set to NO the
+# shortest path that makes the file name unique will be used
+# The default value is: YES.
+
+FULL_PATH_NAMES        = YES
+
+# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path.
+# Stripping is only done if one of the specified strings matches the left-hand
+# part of the path. The tag can be used to show relative paths in the file list.
+# If left blank the directory from which doxygen is run is used as the path to
+# strip.
+#
+# Note that you can specify absolute paths here, but also relative paths, which
+# will be relative from the directory where doxygen is started.
+# This tag requires that the tag FULL_PATH_NAMES is set to YES.
+
+STRIP_FROM_PATH        = @CMAKE_CURRENT_SOURCE_DIR@/src \
+                         @CMAKE_CURRENT_BINARY_DIR@/src
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
+# path mentioned in the documentation of a class, which tells the reader which
+# header file to include in order to use a class. If left blank only the name of
+# the header file containing the class definition is used. Otherwise one should
+# specify the list of include paths that are normally passed to the compiler
+# using the -I flag.
+
+STRIP_FROM_INC_PATH    = $<JOIN:@inc@, >
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
+# less readable) file names. This can be useful is your file systems doesn't
+# support long names like on DOS, Mac, or CD-ROM.
+# The default value is: NO.
+
+SHORT_NAMES            = NO
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
+# first line (until the first dot) of a Javadoc-style comment as the brief
+# description. If set to NO, the Javadoc-style will behave just like regular Qt-
+# style comments (thus requiring an explicit @brief command for a brief
+# description.)
+# The default value is: NO.
+
+JAVADOC_AUTOBRIEF      = YES
+
+# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
+# line (until the first dot) of a Qt-style comment as the brief description. If
+# set to NO, the Qt-style will behave just like regular Qt-style comments (thus
+# requiring an explicit \brief command for a brief description.)
+# The default value is: NO.
+
+QT_AUTOBRIEF           = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
+# multi-line C++ special comment block (i.e. a block of //! or /// comments) as
+# a brief description. This used to be the default behavior. The new default is
+# to treat a multi-line C++ comment block as a detailed description. Set this
+# tag to YES if you prefer the old behavior instead.
+#
+# Note that setting this tag to YES also means that rational rose comments are
+# not recognized any more.
+# The default value is: NO.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the
+# documentation from any documented member that it re-implements.
+# The default value is: YES.
+
+INHERIT_DOCS           = YES
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new
+# page for each member. If set to NO, the documentation of a member will be part
+# of the file/class/namespace that contains it.
+# The default value is: NO.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
+# uses this value to replace tabs by spaces in code fragments.
+# Minimum value: 1, maximum value: 16, default value: 4.
+
+TAB_SIZE               = 4
+
+# This tag can be used to specify a number of aliases that act as commands in
+# the documentation. An alias has the form:
+# name=value
+# For example adding
+# "sideeffect=@par Side Effects:\n"
+# will allow you to put the command \sideeffect (or @sideeffect) in the
+# documentation, which will result in a user-defined paragraph with heading
+# "Side Effects:". You can put \n's in the value part of an alias to insert
+# newlines (in the resulting output). You can put ^^ in the value part of an
+# alias to insert a newline as if a physical newline was in the original file.
+
+ALIASES                =
+
+# This tag can be used to specify a number of word-keyword mappings (TCL only).
+# A mapping has the form "name=value". For example adding "class=itcl::class"
+# will allow you to use the command class in the itcl::class meaning.
+
+TCL_SUBST              =
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
+# only. Doxygen will then generate output that is more tailored for C. For
+# instance, some of the names that are used will be different. The list of all
+# members will be omitted, etc.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_FOR_C  = YES
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or
+# Python sources only. Doxygen will then generate output that is more tailored
+# for that language. For instance, namespaces will be presented as packages,
+# qualified scopes will look different, etc.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_JAVA   = NO
+
+# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
+# sources. Doxygen will then generate output that is tailored for Fortran.
+# The default value is: NO.
+
+OPTIMIZE_FOR_FORTRAN   = NO
+
+# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
+# sources. Doxygen will then generate output that is tailored for VHDL.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_VHDL   = NO
+
+# Doxygen selects the parser to use depending on the extension of the files it
+# parses. With this tag you can assign which parser to use for a given
+# extension. Doxygen has a built-in mapping, but you can override or extend it
+# using this tag. The format is ext=language, where ext is a file extension, and
+# language is one of the parsers supported by doxygen: IDL, Java, Javascript,
+# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran:
+# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran:
+# Fortran. In the later case the parser tries to guess whether the code is fixed
+# or free formatted code, this is the default for Fortran type files), VHDL. For
+# instance to make doxygen treat .inc files as Fortran files (default is PHP),
+# and .f files as C (default is Fortran), use: inc=Fortran f=C.
+#
+# Note: For files without extension you can use no_extension as a placeholder.
+#
+# Note that for custom extensions you also need to set FILE_PATTERNS otherwise
+# the files are not read by doxygen.
+
+EXTENSION_MAPPING      =
+
+# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
+# according to the Markdown format, which allows for more readable
+# documentation. See http://daringfireball.net/projects/markdown/ for details.
+# The output of markdown processing is further processed by doxygen, so you can
+# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in
+# case of backward compatibilities issues.
+# The default value is: YES.
+
+MARKDOWN_SUPPORT       = YES
+
+# When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up
+# to that level are automatically included in the table of contents, even if
+# they do not have an id attribute.
+# Note: This feature currently applies only to Markdown headings.
+# Minimum value: 0, maximum value: 99, default value: 0.
+# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
+
+TOC_INCLUDE_HEADINGS   = 0
+
+# When enabled doxygen tries to link words that correspond to documented
+# classes, or namespaces to their corresponding documentation. Such a link can
+# be prevented in individual cases by putting a % sign in front of the word or
+# globally by setting AUTOLINK_SUPPORT to NO.
+# The default value is: YES.
+
+AUTOLINK_SUPPORT       = YES
+
+# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
+# to include (a tag file for) the STL sources as input, then you should set this
+# tag to YES in order to let doxygen match functions declarations and
+# definitions whose arguments contain STL classes (e.g. func(std::string);
+# versus func(std::string) {}). This also make the inheritance and collaboration
+# diagrams that involve STL classes more complete and accurate.
+# The default value is: NO.
+
+BUILTIN_STL_SUPPORT    = NO
+
+# If you use Microsoft's C++/CLI language, you should set this option to YES to
+# enable parsing support.
+# The default value is: NO.
+
+CPP_CLI_SUPPORT        = NO
+
+# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
+# https://www.riverbankcomputing.com/software/sip/intro) sources only. Doxygen
+# will parse them like normal C++ but will assume all classes use public instead
+# of private inheritance when no explicit protection keyword is present.
+# The default value is: NO.
+
+SIP_SUPPORT            = NO
+
+# For Microsoft's IDL there are propget and propput attributes to indicate
+# getter and setter methods for a property. Setting this option to YES will make
+# doxygen to replace the get and set methods by a property in the documentation.
+# This will only work if the methods are indeed getting or setting a simple
+# type. If this is not the case, or you want to show the methods anyway, you
+# should set this option to NO.
+# The default value is: YES.
+
+IDL_PROPERTY_SUPPORT   = YES
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
+# tag is set to YES then doxygen will reuse the documentation of the first
+# member in the group (if any) for the other members of the group. By default
+# all members of a group must be documented explicitly.
+# The default value is: NO.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# If one adds a struct or class to a group and this option is enabled, then also
+# any nested class or struct is added to the same group. By default this option
+# is disabled and one has to add nested compounds explicitly via \ingroup.
+# The default value is: NO.
+
+GROUP_NESTED_COMPOUNDS = NO
+
+# Set the SUBGROUPING tag to YES to allow class member groups of the same type
+# (for instance a group of public functions) to be put as a subgroup of that
+# type (e.g. under the Public Functions section). Set it to NO to prevent
+# subgrouping. Alternatively, this can be done per class using the
+# \nosubgrouping command.
+# The default value is: YES.
+
+SUBGROUPING            = YES
+
+# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions
+# are shown inside the group in which they are included (e.g. using \ingroup)
+# instead of on a separate page (for HTML and Man pages) or section (for LaTeX
+# and RTF).
+#
+# Note that this feature does not work in combination with
+# SEPARATE_MEMBER_PAGES.
+# The default value is: NO.
+
+INLINE_GROUPED_CLASSES = NO
+
+# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions
+# with only public data fields or simple typedef fields will be shown inline in
+# the documentation of the scope in which they are defined (i.e. file,
+# namespace, or group documentation), provided this scope is documented. If set
+# to NO, structs, classes, and unions are shown on a separate page (for HTML and
+# Man pages) or section (for LaTeX and RTF).
+# The default value is: NO.
+
+INLINE_SIMPLE_STRUCTS  = NO
+
+# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
+# enum is documented as struct, union, or enum with the name of the typedef. So
+# typedef struct TypeS {} TypeT, will appear in the documentation as a struct
+# with name TypeT. When disabled the typedef will appear as a member of a file,
+# namespace, or class. And the struct will be named TypeS. This can typically be
+# useful for C code in case the coding convention dictates that all compound
+# types are typedef'ed and only the typedef is referenced, never the tag name.
+# The default value is: NO.
+
+TYPEDEF_HIDES_STRUCT   = NO
+
+# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This
+# cache is used to resolve symbols given their name and scope. Since this can be
+# an expensive process and often the same symbol appears multiple times in the
+# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small
+# doxygen will become slower. If the cache is too large, memory is wasted. The
+# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range
+# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
+# symbols. At the end of a run doxygen will report the cache usage and suggest
+# the optimal cache size from a speed point of view.
+# Minimum value: 0, maximum value: 9, default value: 0.
+
+LOOKUP_CACHE_SIZE      = 0
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
+# documentation are documented, even if no documentation was available. Private
+# class members and static file members will be hidden unless the
+# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
+# Note: This will also disable the warnings about undocumented members that are
+# normally produced when WARNINGS is set to YES.
+# The default value is: NO.
+
+EXTRACT_ALL            = NO
+
+# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
+# be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PRIVATE        = NO
+
+# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal
+# scope will be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PACKAGE        = NO
+
+# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
+# included in the documentation.
+# The default value is: NO.
+
+EXTRACT_STATIC         = NO
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
+# locally in source files will be included in the documentation. If set to NO,
+# only classes defined in header files are included. Does not have any effect
+# for Java sources.
+# The default value is: YES.
+
+EXTRACT_LOCAL_CLASSES  = YES
+
+# This flag is only useful for Objective-C code. If set to YES, local methods,
+# which are defined in the implementation section but not in the interface are
+# included in the documentation. If set to NO, only methods in the interface are
+# included.
+# The default value is: NO.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If this flag is set to YES, the members of anonymous namespaces will be
+# extracted and appear in the documentation as a namespace called
+# 'anonymous_namespace{file}', where file will be replaced with the base name of
+# the file that contains the anonymous namespace. By default anonymous namespace
+# are hidden.
+# The default value is: NO.
+
+EXTRACT_ANON_NSPACES   = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
+# undocumented members inside documented classes or files. If set to NO these
+# members will be included in the various overviews, but no documentation
+# section is generated. This option has no effect if EXTRACT_ALL is enabled.
+# The default value is: NO.
+
+HIDE_UNDOC_MEMBERS     = NO
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
+# undocumented classes that are normally visible in the class hierarchy. If set
+# to NO, these classes will be included in the various overviews. This option
+# has no effect if EXTRACT_ALL is enabled.
+# The default value is: NO.
+
+HIDE_UNDOC_CLASSES     = NO
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend
+# (class|struct|union) declarations. If set to NO, these declarations will be
+# included in the documentation.
+# The default value is: NO.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
+# documentation blocks found inside the body of a function. If set to NO, these
+# blocks will be appended to the function's detailed documentation block.
+# The default value is: NO.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation that is typed after a
+# \internal command is included. If the tag is set to NO then the documentation
+# will be excluded. Set it to YES to include the internal documentation.
+# The default value is: NO.
+
+INTERNAL_DOCS          = NO
+
+# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file
+# names in lower-case letters. If set to YES, upper-case letters are also
+# allowed. This is useful if you have classes or files whose names only differ
+# in case and if your file system supports case sensitive file names. Windows
+# and Mac users are advised to set this option to NO.
+# The default value is: system dependent.
+
+CASE_SENSE_NAMES       = YES
+
+# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with
+# their full class and namespace scopes in the documentation. If set to YES, the
+# scope will be hidden.
+# The default value is: NO.
+
+HIDE_SCOPE_NAMES       = NO
+
+# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will
+# append additional text to a page's title, such as Class Reference. If set to
+# YES the compound reference will be hidden.
+# The default value is: NO.
+
+HIDE_COMPOUND_REFERENCE= NO
+
+# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
+# the files that are included by a file in the documentation of that file.
+# The default value is: YES.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each
+# grouped member an include statement to the documentation, telling the reader
+# which file to include in order to use the member.
+# The default value is: NO.
+
+SHOW_GROUPED_MEMB_INC  = NO
+
+# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include
+# files with double quotes in the documentation rather than with sharp brackets.
+# The default value is: NO.
+
+FORCE_LOCAL_INCLUDES   = NO
+
+# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the
+# documentation for inline members.
+# The default value is: YES.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
+# (detailed) documentation of file and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order.
+# The default value is: YES.
+
+SORT_MEMBER_DOCS       = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
+# descriptions of file, namespace and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order. Note that
+# this will also influence the order of the classes in the class list.
+# The default value is: NO.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
+# (brief and detailed) documentation of class members so that constructors and
+# destructors are listed first. If set to NO the constructors will appear in the
+# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
+# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief
+# member documentation.
+# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
+# detailed member documentation.
+# The default value is: NO.
+
+SORT_MEMBERS_CTORS_1ST = NO
+
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
+# of group names into alphabetical order. If set to NO the group names will
+# appear in their defined order.
+# The default value is: NO.
+
+SORT_GROUP_NAMES       = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
+# fully-qualified names, including namespaces. If set to NO, the class list will
+# be sorted only by class name, not including the namespace part.
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
+# Note: This option applies only to the class list, not to the alphabetical
+# list.
+# The default value is: NO.
+
+SORT_BY_SCOPE_NAME     = NO
+
+# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper
+# type resolution of all parameters of a function it will reject a match between
+# the prototype and the implementation of a member function even if there is
+# only one candidate or it is obvious which candidate to choose by doing a
+# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
+# accept a match between prototype and implementation in such cases.
+# The default value is: NO.
+
+STRICT_PROTO_MATCHING  = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo
+# list. This list is created by putting \todo commands in the documentation.
+# The default value is: YES.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test
+# list. This list is created by putting \test commands in the documentation.
+# The default value is: YES.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug
+# list. This list is created by putting \bug commands in the documentation.
+# The default value is: YES.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO)
+# the deprecated list. This list is created by putting \deprecated commands in
+# the documentation.
+# The default value is: YES.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional documentation
+# sections, marked by \if <section_label> ... \endif and \cond <section_label>
+# ... \endcond blocks.
+
+ENABLED_SECTIONS       =
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
+# initial value of a variable or macro / define can have for it to appear in the
+# documentation. If the initializer consists of more lines than specified here
+# it will be hidden. Use a value of 0 to hide initializers completely. The
+# appearance of the value of individual variables and macros / defines can be
+# controlled using \showinitializer or \hideinitializer command in the
+# documentation regardless of this setting.
+# Minimum value: 0, maximum value: 10000, default value: 30.
+
+MAX_INITIALIZER_LINES  = 30
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at
+# the bottom of the documentation of classes and structs. If set to YES, the
+# list will mention the files that were used to generate the documentation.
+# The default value is: YES.
+
+SHOW_USED_FILES        = YES
+
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This
+# will remove the Files entry from the Quick Index and from the Folder Tree View
+# (if specified).
+# The default value is: YES.
+
+SHOW_FILES             = YES
+
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces
+# page. This will remove the Namespaces entry from the Quick Index and from the
+# Folder Tree View (if specified).
+# The default value is: YES.
+
+SHOW_NAMESPACES        = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that
+# doxygen should invoke to get the current version for each file (typically from
+# the version control system). Doxygen will invoke the program by executing (via
+# popen()) the command command input-file, where command is the value of the
+# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided
+# by doxygen. Whatever the program writes to standard output is used as the file
+# version. For an example see the documentation.
+
+FILE_VERSION_FILTER    =
+
+# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed
+# by doxygen. The layout file controls the global structure of the generated
+# output files in an output format independent way. To create the layout file
+# that represents doxygen's defaults, run doxygen with the -l option. You can
+# optionally specify a file name after the option, if omitted DoxygenLayout.xml
+# will be used as the name of the layout file.
+#
+# Note that if you run doxygen from a directory containing a file called
+# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE
+# tag is left empty.
+
+LAYOUT_FILE            =
+
+# The CITE_BIB_FILES tag can be used to specify one or more bib files containing
+# the reference definitions. This must be a list of .bib files. The .bib
+# extension is automatically appended if omitted. This requires the bibtex tool
+# to be installed. See also https://en.wikipedia.org/wiki/BibTeX for more info.
+# For LaTeX the style of the bibliography can be controlled using
+# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
+# search path. See also \cite for info how to create references.
+
+CITE_BIB_FILES         =
+
+#---------------------------------------------------------------------------
+# Configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated to
+# standard output by doxygen. If QUIET is set to YES this implies that the
+# messages are off.
+# The default value is: NO.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are
+# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
+# this implies that the warnings are on.
+#
+# Tip: Turn warnings on while writing the documentation.
+# The default value is: YES.
+
+WARNINGS               = YES
+
+# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
+# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag
+# will automatically be disabled.
+# The default value is: YES.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
+# potential errors in the documentation, such as not documenting some parameters
+# in a documented function, or documenting parameters that don't exist or using
+# markup commands wrongly.
+# The default value is: YES.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
+# are documented, but have no documentation for their parameters or return
+# value. If set to NO, doxygen will only warn about wrong or incomplete
+# parameter documentation, but not about the absence of documentation.
+# The default value is: NO.
+
+WARN_NO_PARAMDOC       = NO
+
+# If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when
+# a warning is encountered.
+# The default value is: NO.
+
+WARN_AS_ERROR          = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that doxygen
+# can produce. The string should contain the $file, $line, and $text tags, which
+# will be replaced by the file and line number from which the warning originated
+# and the warning text. Optionally the format may contain $version, which will
+# be replaced by the version of the file (if it could be obtained via
+# FILE_VERSION_FILTER)
+# The default value is: $file:$line: $text.
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning and error
+# messages should be written. If left blank the output is written to standard
+# error (stderr).
+
+WARN_LOGFILE           =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag is used to specify the files and/or directories that contain
+# documented source files. You may enter file names like myfile.cpp or
+# directories like /usr/src/myproject. Separate the files or directories with
+# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
+# Note: If this tag is empty the current directory is searched.
+
+INPUT                  = @CMAKE_CURRENT_SOURCE_DIR@/src \
+                         @CMAKE_CURRENT_BINARY_DIR@/src
+
+# This tag can be used to specify the character encoding of the source files
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
+# libiconv (or the iconv built into libc) for the transcoding. See the libiconv
+# documentation (see: https://www.gnu.org/software/libiconv/) for the list of
+# possible encodings.
+# The default value is: UTF-8.
+
+INPUT_ENCODING         = UTF-8
+
+# If the value of the INPUT tag contains directories, you can use the
+# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
+# *.h) to filter out the source-files in the directories.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# read by doxygen.
+#
+# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp,
+# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h,
+# *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc,
+# *.m, *.markdown, *.md, *.mm, *.dox, *.py, *.pyw, *.f90, *.f95, *.f03, *.f08,
+# *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf and *.qsf.
+
+FILE_PATTERNS          = *.c \
+                         *.cc \
+                         *.cxx \
+                         *.cpp \
+                         *.c++ \
+                         *.java \
+                         *.ii \
+                         *.ixx \
+                         *.ipp \
+                         *.i++ \
+                         *.inl \
+                         *.idl \
+                         *.ddl \
+                         *.odl \
+                         *.h \
+                         *.hh \
+                         *.hxx \
+                         *.hpp \
+                         *.h++ \
+                         *.cs \
+                         *.d \
+                         *.php \
+                         *.php4 \
+                         *.php5 \
+                         *.phtml \
+                         *.inc \
+                         *.m \
+                         *.markdown \
+                         *.md \
+                         *.mm \
+                         *.dox \
+                         *.py \
+                         *.pyw \
+                         *.f90 \
+                         *.f95 \
+                         *.f03 \
+                         *.f08 \
+                         *.f \
+                         *.for \
+                         *.tcl \
+                         *.vhd \
+                         *.vhdl \
+                         *.ucf \
+                         *.qsf
+
+# The RECURSIVE tag can be used to specify whether or not subdirectories should
+# be searched for input files as well.
+# The default value is: NO.
+
+RECURSIVE              = YES
+
+# The EXCLUDE tag can be used to specify files and/or directories that should be
+# excluded from the INPUT source files. This way you can easily exclude a
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+#
+# Note that relative paths are relative to the directory from which doxygen is
+# run.
+
+EXCLUDE                =
+
+# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
+# directories that are symbolic links (a Unix file system feature) are excluded
+# from the input.
+# The default value is: NO.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
+# certain files from those directories.
+#
+# Note that the wildcards are matched against the file with absolute path, so to
+# exclude all test directories for example use the pattern */test/*
+
+EXCLUDE_PATTERNS       =
+
+# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
+# (namespaces, classes, functions, etc.) that should be excluded from the
+# output. The symbol name can be a fully qualified name, a word, or if the
+# wildcard * is used, a substring. Examples: ANamespace, AClass,
+# AClass::ANamespace, ANamespace::*Test
+#
+# Note that the wildcards are matched against the file with absolute path, so to
+# exclude all test directories use the pattern */test/*
+
+EXCLUDE_SYMBOLS        =
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or directories
+# that contain example code fragments that are included (see the \include
+# command).
+
+EXAMPLE_PATH           =
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
+# *.h) to filter out the source-files in the directories. If left blank all
+# files are included.
+
+EXAMPLE_PATTERNS       = *
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
+# searched for input files to be used with the \include or \dontinclude commands
+# irrespective of the value of the RECURSIVE tag.
+# The default value is: NO.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or directories
+# that contain images that are to be included in the documentation (see the
+# \image command).
+
+IMAGE_PATH             =
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should
+# invoke to filter for each input file. Doxygen will invoke the filter program
+# by executing (via popen()) the command:
+#
+# <filter> <input-file>
+#
+# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the
+# name of an input file. Doxygen will then use the output that the filter
+# program writes to standard output. If FILTER_PATTERNS is specified, this tag
+# will be ignored.
+#
+# Note that the filter must not add or remove lines; it is applied before the
+# code is scanned, but not when the output code is generated. If lines are added
+# or removed, the anchors will not be placed correctly.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# properly processed by doxygen.
+
+INPUT_FILTER           =
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
+# basis. Doxygen will compare the file name with each pattern and apply the
+# filter if there is a match. The filters are a list of the form: pattern=filter
+# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how
+# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
+# patterns match the file name, INPUT_FILTER is applied.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# properly processed by doxygen.
+
+FILTER_PATTERNS        =
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
+# INPUT_FILTER) will also be used to filter the input files that are used for
+# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES).
+# The default value is: NO.
+
+FILTER_SOURCE_FILES    = NO
+
+# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file
+# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and
+# it is also possible to disable source filtering for a specific pattern using
+# *.ext= (so without naming a filter).
+# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
+
+FILTER_SOURCE_PATTERNS =
+
+# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that
+# is part of the input, its contents will be placed on the main page
+# (index.html). This can be useful if you have a project on for instance GitHub
+# and want to reuse the introduction page also for the doxygen output.
+
+USE_MDFILE_AS_MAINPAGE =
+
+#---------------------------------------------------------------------------
+# Configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will be
+# generated. Documented entities will be cross-referenced with these sources.
+#
+# Note: To get rid of all source code in the generated output, make sure that
+# also VERBATIM_HEADERS is set to NO.
+# The default value is: NO.
+
+SOURCE_BROWSER         = NO
+
+# Setting the INLINE_SOURCES tag to YES will include the body of functions,
+# classes and enums directly into the documentation.
+# The default value is: NO.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any
+# special comment blocks from generated source code fragments. Normal C, C++ and
+# Fortran comments will always remain visible.
+# The default value is: YES.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
+# entity all documented functions referencing it will be listed.
+# The default value is: NO.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES then for each documented function
+# all documented entities called/used by that function will be listed.
+# The default value is: NO.
+
+REFERENCES_RELATION    = NO
+
+# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set
+# to YES then the hyperlinks from functions in REFERENCES_RELATION and
+# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will
+# link to the documentation.
+# The default value is: YES.
+
+REFERENCES_LINK_SOURCE = YES
+
+# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the
+# source code will show a tooltip with additional information such as prototype,
+# brief description and links to the definition and documentation. Since this
+# will make the HTML file larger and loading of large files a bit slower, you
+# can opt to disable this feature.
+# The default value is: YES.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
+
+SOURCE_TOOLTIPS        = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code will
+# point to the HTML generated by the htags(1) tool instead of doxygen built-in
+# source browser. The htags tool is part of GNU's global source tagging system
+# (see https://www.gnu.org/software/global/global.html). You will need version
+# 4.8.6 or higher.
+#
+# To use it do the following:
+# - Install the latest version of global
+# - Enable SOURCE_BROWSER and USE_HTAGS in the config file
+# - Make sure the INPUT points to the root of the source tree
+# - Run doxygen as normal
+#
+# Doxygen will invoke htags (and that will in turn invoke gtags), so these
+# tools must be available from the command line (i.e. in the search path).
+#
+# The result: instead of the source browser generated by doxygen, the links to
+# source code will now point to the output of htags.
+# The default value is: NO.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
+
+USE_HTAGS              = NO
+
+# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
+# verbatim copy of the header file for each class for which an include is
+# specified. Set to NO to disable this.
+# See also: Section \class.
+# The default value is: YES.
+
+VERBATIM_HEADERS       = YES
+
+# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the
+# clang parser (see: http://clang.llvm.org/) for more accurate parsing at the
+# cost of reduced performance. This can be particularly helpful with template
+# rich C++ code for which doxygen's built-in parser lacks the necessary type
+# information.
+# Note: The availability of this option depends on whether or not doxygen was
+# generated with the -Duse-libclang=ON option for CMake.
+# The default value is: NO.
+
+CLANG_ASSISTED_PARSING = YES
+
+# If clang assisted parsing is enabled you can provide the compiler with command
+# line options that you would normally use when invoking the compiler. Note that
+# the include paths will already be set by doxygen for the files and directories
+# specified with INPUT and INCLUDE_PATH.
+# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
+
+CLANG_OPTIONS          =
+
+# If clang assisted parsing is enabled you can provide the clang parser with the
+# path to the compilation database (see:
+# http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html) used when the files
+# were built. This is equivalent to specifying the "-p" option to a clang tool,
+# such as clang-check. These options will then be passed to the parser.
+# Note: The availability of this option depends on whether or not doxygen was
+# generated with the -Duse-libclang=ON option for CMake.
+# The default value is: 0.
+
+CLANG_COMPILATION_DATABASE_PATH = @CMAKE_CURRENT_BINARY_DIR@/compile_commands.json
+
+#---------------------------------------------------------------------------
+# Configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
+# compounds will be generated. Enable this if the project contains a lot of
+# classes, structs, unions or interfaces.
+# The default value is: YES.
+
+ALPHABETICAL_INDEX     = YES
+
+# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
+# which the alphabetical index list will be split.
+# Minimum value: 1, maximum value: 20, default value: 5.
+# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
+
+COLS_IN_ALPHA_INDEX    = 5
+
+# In case all classes in a project start with a common prefix, all classes will
+# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
+# can be used to specify a prefix (or a list of prefixes) that should be ignored
+# while generating the index headers.
+# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
+
+IGNORE_PREFIX          =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
+# The default value is: YES.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
+# generated HTML page (for example: .htm, .php, .asp).
+# The default value is: .html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a user-defined HTML header file for
+# each generated HTML page. If the tag is left blank doxygen will generate a
+# standard header.
+#
+# To get valid HTML the header file that includes any scripts and style sheets
+# that doxygen needs, which is dependent on the configuration options used (e.g.
+# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
+# default header using
+# doxygen -w html new_header.html new_footer.html new_stylesheet.css
+# YourConfigFile
+# and then modify the file new_header.html. See also section "Doxygen usage"
+# for information on how to generate the default header that doxygen normally
+# uses.
+# Note: The header is subject to change so you typically have to regenerate the
+# default header when upgrading to a newer version of doxygen. For a description
+# of the possible markers and block names see the documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_HEADER            =
+
+# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
+# generated HTML page. If the tag is left blank doxygen will generate a standard
+# footer. See HTML_HEADER for more information on how to generate a default
+# footer and what special commands can be used inside the footer. See also
+# section "Doxygen usage" for information on how to generate the default footer
+# that doxygen normally uses.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_FOOTER            =
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
+# sheet that is used by each HTML page. It can be used to fine-tune the look of
+# the HTML output. If left blank doxygen will generate a default style sheet.
+# See also section "Doxygen usage" for information on how to generate the style
+# sheet that doxygen normally uses.
+# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as
+# it is more robust and this tag (HTML_STYLESHEET) will in the future become
+# obsolete.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_STYLESHEET        =
+
+# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# cascading style sheets that are included after the standard style sheets
+# created by doxygen. Using this option one can overrule certain style aspects.
+# This is preferred over using HTML_STYLESHEET since it does not replace the
+# standard style sheet and is therefore more robust against future updates.
+# Doxygen will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list). For an example see the documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_STYLESHEET  =
+
+# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the HTML output directory. Note
+# that these files will be copied to the base HTML output directory. Use the
+# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
+# files. In the HTML_STYLESHEET file, use the file name only. Also note that the
+# files will be copied as-is; there are no commands or markers available.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_FILES       =
+
+# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
+# will adjust the colors in the style sheet and background images according to
+# this color. Hue is specified as an angle on a colorwheel, see
+# https://en.wikipedia.org/wiki/Hue for more information. For instance the value
+# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300
+# purple, and 360 is red again.
+# Minimum value: 0, maximum value: 359, default value: 220.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_HUE    = 220
+
+# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
+# in the HTML output. For a value of 0 the output will use grayscales only. A
+# value of 255 will produce the most vivid colors.
+# Minimum value: 0, maximum value: 255, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_SAT    = 100
+
+# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
+# luminance component of the colors in the HTML output. Values below 100
+# gradually make the output lighter, whereas values above 100 make the output
+# darker. The value divided by 100 is the actual gamma applied, so 80 represents
+# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
+# change the gamma.
+# Minimum value: 40, maximum value: 240, default value: 80.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_GAMMA  = 80
+
+# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
+# page will contain the date and time when the page was generated. Setting this
+# to YES can help to show when doxygen was last run and thus if the
+# documentation is up to date.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_TIMESTAMP         = NO
+
+# If the HTML_DYNAMIC_MENUS tag is set to YES then the generated HTML
+# documentation will contain a main index with vertical navigation menus that
+# are dynamically created via Javascript. If disabled, the navigation index will
+# consists of multiple levels of tabs that are statically embedded in every HTML
+# page. Disable this option to support browsers that do not have Javascript,
+# like the Qt help browser.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_DYNAMIC_MENUS     = YES
+
+# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
+# documentation will contain sections that can be hidden and shown after the
+# page has loaded.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_DYNAMIC_SECTIONS  = NO
+
+# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
+# shown in the various tree structured indices initially; the user can expand
+# and collapse entries dynamically later on. Doxygen will expand the tree to
+# such a level that at most the specified number of entries are visible (unless
+# a fully collapsed tree already exceeds this amount). So setting the number of
+# entries 1 will produce a full collapsed tree by default. 0 is a special value
+# representing an infinite number of entries and will result in a full expanded
+# tree by default.
+# Minimum value: 0, maximum value: 9999, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_INDEX_NUM_ENTRIES = 100
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files will be
+# generated that can be used as input for Apple's Xcode 3 integrated development
+# environment (see: https://developer.apple.com/tools/xcode/), introduced with
+# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
+# Makefile in the HTML output directory. Running make will produce the docset in
+# that directory and running make install will install the docset in
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
+# startup. See https://developer.apple.com/tools/creatingdocsetswithdoxygen.html
+# for more information.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_DOCSET        = NO
+
+# This tag determines the name of the docset feed. A documentation feed provides
+# an umbrella under which multiple documentation sets from a single provider
+# (such as a company or product suite) can be grouped.
+# The default value is: Doxygen generated docs.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_FEEDNAME        = "Doxygen generated docs"
+
+# This tag specifies a string that should uniquely identify the documentation
+# set bundle. This should be a reverse domain-name style string, e.g.
+# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_BUNDLE_ID       = org.doxygen.Project
+
+# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify
+# the documentation publisher. This should be a reverse domain-name style
+# string, e.g. com.mycompany.MyDocSet.documentation.
+# The default value is: org.doxygen.Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
+
+# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
+# The default value is: Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_NAME  = Publisher
+
+# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
+# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
+# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
+# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on
+# Windows.
+#
+# The HTML Help Workshop contains a compiler that can convert all HTML output
+# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML
+# files are now used as the Windows 98 help format, and will replace the old
+# Windows help format (.hlp) on all Windows platforms in the future. Compressed
+# HTML files also contain an index, a table of contents, and you can search for
+# words in the documentation. The HTML workshop also contains a viewer for
+# compressed HTML files.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_HTMLHELP      = NO
+
+# The CHM_FILE tag can be used to specify the file name of the resulting .chm
+# file. You can add a path in front of the file if the result should not be
+# written to the html output directory.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+CHM_FILE               =
+
+# The HHC_LOCATION tag can be used to specify the location (absolute path
+# including file name) of the HTML help compiler (hhc.exe). If non-empty,
+# doxygen will try to run the HTML help compiler on the generated index.hhp.
+# The file has to be specified with full path.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+HHC_LOCATION           =
+
+# The GENERATE_CHI flag controls if a separate .chi index file is generated
+# (YES) or that it should be included in the master .chm file (NO).
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+GENERATE_CHI           = NO
+
+# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc)
+# and project file content.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+CHM_INDEX_ENCODING     =
+
+# The BINARY_TOC flag controls whether a binary table of contents is generated
+# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
+# enables the Previous and Next buttons.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members to
+# the table of contents of the HTML help documentation and to the tree view.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+TOC_EXPAND             = NO
+
+# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
+# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
+# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help
+# (.qch) of the generated HTML documentation.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_QHP           = NO
+
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify
+# the file name of the resulting .qch file. The path specified is relative to
+# the HTML output folder.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QCH_FILE               =
+
+# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help
+# Project output. For more information please see Qt Help Project / Namespace
+# (see: http://doc.qt.io/qt-4.8/qthelpproject.html#namespace).
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_NAMESPACE          = org.doxygen.Project
+
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt
+# Help Project output. For more information please see Qt Help Project / Virtual
+# Folders (see: http://doc.qt.io/qt-4.8/qthelpproject.html#virtual-folders).
+# The default value is: doc.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_VIRTUAL_FOLDER     = doc
+
+# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
+# filter to add. For more information please see Qt Help Project / Custom
+# Filters (see: http://doc.qt.io/qt-4.8/qthelpproject.html#custom-filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_CUST_FILTER_NAME   =
+
+# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
+# custom filter to add. For more information please see Qt Help Project / Custom
+# Filters (see: http://doc.qt.io/qt-4.8/qthelpproject.html#custom-filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_CUST_FILTER_ATTRS  =
+
+# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
+# project's filter section matches. Qt Help Project / Filter Attributes (see:
+# http://doc.qt.io/qt-4.8/qthelpproject.html#filter-attributes).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_SECT_FILTER_ATTRS  =
+
+# The QHG_LOCATION tag can be used to specify the location of Qt's
+# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the
+# generated .qhp file.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHG_LOCATION           =
+
+# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be
+# generated, together with the HTML files, they form an Eclipse help plugin. To
+# install this plugin and make it available under the help contents menu in
+# Eclipse, the contents of the directory containing the HTML and XML files needs
+# to be copied into the plugins directory of eclipse. The name of the directory
+# within the plugins directory should be the same as the ECLIPSE_DOC_ID value.
+# After copying Eclipse needs to be restarted before the help appears.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_ECLIPSEHELP   = NO
+
+# A unique identifier for the Eclipse help plugin. When installing the plugin
+# the directory name containing the HTML and XML files should also have this
+# name. Each documentation set should have its own identifier.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
+
+ECLIPSE_DOC_ID         = org.doxygen.Project
+
+# If you want full control over the layout of the generated HTML pages it might
+# be necessary to disable the index and replace it with your own. The
+# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top
+# of each HTML page. A value of NO enables the index and the value YES disables
+# it. Since the tabs in the index contain the same information as the navigation
+# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+DISABLE_INDEX          = NO
+
+# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
+# structure should be generated to display hierarchical information. If the tag
+# value is set to YES, a side panel will be generated containing a tree-like
+# index structure (just like the one that is generated for HTML Help). For this
+# to work a browser that supports JavaScript, DHTML, CSS and frames is required
+# (i.e. any modern browser). Windows users are probably better off using the
+# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can
+# further fine-tune the look of the index. As an example, the default style
+# sheet generated by doxygen has an example that shows how to put an image at
+# the root of the tree instead of the PROJECT_NAME. Since the tree basically has
+# the same information as the tab index, you could consider setting
+# DISABLE_INDEX to YES when enabling this option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_TREEVIEW      = NO
+
+# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
+# doxygen will group on one line in the generated HTML documentation.
+#
+# Note that a value of 0 will completely suppress the enum values from appearing
+# in the overview section.
+# Minimum value: 0, maximum value: 20, default value: 4.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used
+# to set the initial width (in pixels) of the frame in which the tree is shown.
+# Minimum value: 0, maximum value: 1500, default value: 250.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+TREEVIEW_WIDTH         = 250
+
+# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
+# external symbols imported via tag files in a separate window.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+EXT_LINKS_IN_WINDOW    = NO
+
+# Use this tag to change the font size of LaTeX formulas included as images in
+# the HTML documentation. When you change the font size after a successful
+# doxygen run you need to manually remove any form_*.png images from the HTML
+# output directory to force them to be regenerated.
+# Minimum value: 8, maximum value: 50, default value: 10.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+FORMULA_FONTSIZE       = 10
+
+# Use the FORMULA_TRANSPARENT tag to determine whether or not the images
+# generated for formulas are transparent PNGs. Transparent PNGs are not
+# supported properly for IE 6.0, but are supported on all modern browsers.
+#
+# Note that when changing this option you need to delete any form_*.png files in
+# the HTML output directory before the changes have effect.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+FORMULA_TRANSPARENT    = YES
+
+# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
+# https://www.mathjax.org) which uses client side Javascript for the rendering
+# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
+# installed or if you want to formulas look prettier in the HTML output. When
+# enabled you may also need to install MathJax separately and configure the path
+# to it using the MATHJAX_RELPATH option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+USE_MATHJAX            = NO
+
+# When MathJax is enabled you can set the default output format to be used for
+# the MathJax output. See the MathJax site (see:
+# http://docs.mathjax.org/en/latest/output.html) for more details.
+# Possible values are: HTML-CSS (which is slower, but has the best
+# compatibility), NativeMML (i.e. MathML) and SVG.
+# The default value is: HTML-CSS.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_FORMAT         = HTML-CSS
+
+# When MathJax is enabled you need to specify the location relative to the HTML
+# output directory using the MATHJAX_RELPATH option. The destination directory
+# should contain the MathJax.js script. For instance, if the mathjax directory
+# is located at the same level as the HTML output directory, then
+# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
+# Content Delivery Network so you can quickly see the result without installing
+# MathJax. However, it is strongly recommended to install a local copy of
+# MathJax from https://www.mathjax.org before deployment.
+# The default value is: https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_RELPATH        = https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/
+
+# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
+# extension names that should be enabled during MathJax rendering. For example
+# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_EXTENSIONS     =
+
+# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
+# of code that will be used on startup of the MathJax code. See the MathJax site
+# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an
+# example see the documentation.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_CODEFILE       =
+
+# When the SEARCHENGINE tag is enabled doxygen will generate a search box for
+# the HTML output. The underlying search engine uses javascript and DHTML and
+# should work on any modern browser. Note that when using HTML help
+# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
+# there is already a search function so this one should typically be disabled.
+# For large projects the javascript based search engine can be slow, then
+# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to
+# search using the keyboard; to jump to the search box use <access key> + S
+# (what the <access key> is depends on the OS and browser, but it is typically
+# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down
+# key> to jump into the search results window, the results can be navigated
+# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel
+# the search. The filter options can be selected when the cursor is inside the
+# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys>
+# to select a filter and <Enter> or <escape> to activate or cancel the filter
+# option.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+SEARCHENGINE           = YES
+
+# When the SERVER_BASED_SEARCH tag is enabled the search engine will be
+# implemented using a web server instead of a web client using Javascript. There
+# are two flavors of web server based searching depending on the EXTERNAL_SEARCH
+# setting. When disabled, doxygen will generate a PHP script for searching and
+# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing
+# and searching needs to be provided by external tools. See the section
+# "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SERVER_BASED_SEARCH    = NO
+
+# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP
+# script for searching. Instead the search results are written to an XML file
+# which needs to be processed by an external indexer. Doxygen will invoke an
+# external search engine pointed to by the SEARCHENGINE_URL option to obtain the
+# search results.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see: https://xapian.org/).
+#
+# See the section "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH        = NO
+
+# The SEARCHENGINE_URL should point to a search engine hosted by a web server
+# which will return the search results when EXTERNAL_SEARCH is enabled.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see: https://xapian.org/). See the section "External Indexing and
+# Searching" for details.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHENGINE_URL       =
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
+# search data is written to a file for indexing by an external tool. With the
+# SEARCHDATA_FILE tag the name of this file can be specified.
+# The default file is: searchdata.xml.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHDATA_FILE        = searchdata.xml
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
+# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is
+# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple
+# projects and redirect the results back to the right project.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH_ID     =
+
+# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen
+# projects other than the one defined by this configuration file, but that are
+# all added to the same external search index. Each project needs to have a
+# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of
+# to a relative location where the documentation can be found. The format is:
+# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTRA_SEARCH_MAPPINGS  =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
+# The default value is: YES.
+
+GENERATE_LATEX         = YES
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: latex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
+# invoked.
+#
+# Note that when enabling USE_PDFLATEX this option is only used for generating
+# bitmaps for formulas in the HTML output, but not in the Makefile that is
+# written to the output directory.
+# The default file is: latex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate
+# index for LaTeX.
+# The default file is: makeindex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+COMPACT_LATEX          = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used by the
+# printer.
+# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x
+# 14 inches) and executive (7.25 x 10.5 inches).
+# The default value is: a4.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+PAPER_TYPE             = a4
+
+# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names
+# that should be included in the LaTeX output. The package can be specified just
+# by its name or with the correct syntax as to be used with the LaTeX
+# \usepackage command. To get the times font for instance you can specify :
+# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times}
+# To use the option intlimits with the amsmath package you can specify:
+# EXTRA_PACKAGES=[intlimits]{amsmath}
+# If left blank no extra packages will be included.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+EXTRA_PACKAGES         =
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for the
+# generated LaTeX document. The header should contain everything until the first
+# chapter. If it is left blank doxygen will generate a standard header. See
+# section "Doxygen usage" for information on how to let doxygen write the
+# default header to a separate file.
+#
+# Note: Only use a user-defined header if you know what you are doing! The
+# following commands have a special meaning inside the header: $title,
+# $datetime, $date, $doxygenversion, $projectname, $projectnumber,
+# $projectbrief, $projectlogo. Doxygen will replace $title with the empty
+# string, for the replacement values of the other commands the user is referred
+# to HTML_HEADER.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_HEADER           =
+
+# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for the
+# generated LaTeX document. The footer should contain everything after the last
+# chapter. If it is left blank doxygen will generate a standard footer. See
+# LATEX_HEADER for more information on how to generate a default footer and what
+# special commands can be used inside the footer.
+#
+# Note: Only use a user-defined footer if you know what you are doing!
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_FOOTER           =
+
+# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# LaTeX style sheets that are included after the standard style sheets created
+# by doxygen. Using this option one can overrule certain style aspects. Doxygen
+# will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list).
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_STYLESHEET =
+
+# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the LATEX_OUTPUT output
+# directory. Note that the files will be copied as-is; there are no commands or
+# markers available.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_FILES      =
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
+# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will
+# contain links (just like the HTML output) instead of page references. This
+# makes the output suitable for online browsing using a PDF viewer.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to generate
+# the PDF file directly from the LaTeX files. Set this option to YES, to get a
+# higher quality PDF documentation.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode
+# command to the generated LaTeX files. This will instruct LaTeX to keep running
+# if errors occur, instead of asking the user for help. This option is also used
+# when generating formulas in HTML.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_BATCHMODE        = NO
+
+# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the
+# index chapters (such as File Index, Compound Index, etc.) in the output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_HIDE_INDICES     = NO
+
+# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include source
+# code with syntax highlighting in the LaTeX output.
+#
+# Note that which sources are shown also depends on other settings such as
+# SOURCE_BROWSER.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_SOURCE_CODE      = NO
+
+# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
+# bibliography, e.g. plainnat, or ieeetr. See
+# https://en.wikipedia.org/wiki/BibTeX and \cite for more info.
+# The default value is: plain.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_BIB_STYLE        = plain
+
+# If the LATEX_TIMESTAMP tag is set to YES then the footer of each generated
+# page will contain the date and time when the page was generated. Setting this
+# to NO can help when comparing the output of multiple runs.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_TIMESTAMP        = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The
+# RTF output is optimized for Word 97 and may not look too pretty with other RTF
+# readers/editors.
+# The default value is: NO.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: rtf.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
+# contain hyperlink fields. The RTF file will contain links (just like the HTML
+# output) instead of page references. This makes the output suitable for online
+# browsing using Word or some other Word compatible readers that support those
+# fields.
+#
+# Note: WordPad (write) and others do not support links.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's config
+# file, i.e. a series of assignments. You only have to provide replacements,
+# missing definitions are set to their default value.
+#
+# See also section "Doxygen usage" for information on how to generate the
+# default style sheet that doxygen normally uses.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_STYLESHEET_FILE    =
+
+# Set optional variables used in the generation of an RTF document. Syntax is
+# similar to doxygen's config file. A template extensions file can be generated
+# using doxygen -e rtf extensionFile.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_EXTENSIONS_FILE    =
+
+# If the RTF_SOURCE_CODE tag is set to YES then doxygen will include source code
+# with syntax highlighting in the RTF output.
+#
+# Note that which sources are shown also depends on other settings such as
+# SOURCE_BROWSER.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_SOURCE_CODE        = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
+# classes and files.
+# The default value is: NO.
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it. A directory man3 will be created inside the directory specified by
+# MAN_OUTPUT.
+# The default directory is: man.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to the generated
+# man pages. In case the manual section does not start with a number, the number
+# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
+# optional.
+# The default value is: .3.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_EXTENSION          = .3
+
+# The MAN_SUBDIR tag determines the name of the directory created within
+# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by
+# MAN_EXTENSION with the initial . removed.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_SUBDIR             =
+
+# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it
+# will generate one additional man file for each entity documented in the real
+# man page(s). These additional files only source the real man page, but without
+# them the man command would be unable to find the correct page.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that
+# captures the structure of the code including all documentation.
+# The default value is: NO.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: xml.
+# This tag requires that the tag GENERATE_XML is set to YES.
+
+XML_OUTPUT             = xml
+
+# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
+# listings (including syntax highlighting and cross-referencing information) to
+# the XML output. Note that enabling this will significantly increase the size
+# of the XML output.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_XML is set to YES.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# Configuration options related to the DOCBOOK output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files
+# that can be used to generate PDF.
+# The default value is: NO.
+
+GENERATE_DOCBOOK       = NO
+
+# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
+# front of it.
+# The default directory is: docbook.
+# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
+
+DOCBOOK_OUTPUT         = docbook
+
+# If the DOCBOOK_PROGRAMLISTING tag is set to YES, doxygen will include the
+# program listings (including syntax highlighting and cross-referencing
+# information) to the DOCBOOK output. Note that enabling this will significantly
+# increase the size of the DOCBOOK output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
+
+DOCBOOK_PROGRAMLISTING = NO
+
+#---------------------------------------------------------------------------
+# Configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_AUTOGEN_DEF tag is set to YES, doxygen will generate an
+# AutoGen Definitions (see http://autogen.sourceforge.net/) file that captures
+# the structure of the code including all documentation. Note that this feature
+# is still experimental and incomplete at the moment.
+# The default value is: NO.
+
+GENERATE_AUTOGEN_DEF   = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_PERLMOD tag is set to YES, doxygen will generate a Perl module
+# file that captures the structure of the code including all documentation.
+#
+# Note that this feature is still experimental and incomplete at the moment.
+# The default value is: NO.
+
+GENERATE_PERLMOD       = NO
+
+# If the PERLMOD_LATEX tag is set to YES, doxygen will generate the necessary
+# Makefile rules, Perl scripts and LaTeX code to be able to generate PDF and DVI
+# output from the Perl module output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
+
+PERLMOD_LATEX          = NO
+
+# If the PERLMOD_PRETTY tag is set to YES, the Perl module output will be nicely
+# formatted so it can be parsed by a human reader. This is useful if you want to
+# understand what is going on. On the other hand, if this tag is set to NO, the
+# size of the Perl module output will be much smaller and Perl will parse it
+# just the same.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
+
+PERLMOD_PRETTY         = YES
+
+# The names of the make variables in the generated doxyrules.make file are
+# prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. This is useful
+# so different doxyrules.make files included by the same Makefile don't
+# overwrite each other's variables.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
+
+PERLMOD_MAKEVAR_PREFIX =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES, doxygen will evaluate all
+# C-preprocessor directives found in the sources and include files.
+# The default value is: YES.
+
+ENABLE_PREPROCESSING   = YES
+
+# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro names
+# in the source code. If set to NO, only conditional compilation will be
+# performed. Macro expansion can be done in a controlled way by setting
+# EXPAND_ONLY_PREDEF to YES.
+# The default value is: NO.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+MACRO_EXPANSION        = YES
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then
+# the macro expansion is limited to the macros specified with the PREDEFINED and
+# EXPAND_AS_DEFINED tags.
+# The default value is: NO.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+EXPAND_ONLY_PREDEF     = NO
+
+# If the SEARCH_INCLUDES tag is set to YES, the include files in the
+# INCLUDE_PATH will be searched if a #include is found.
+# The default value is: YES.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+SEARCH_INCLUDES        = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that
+# contain include files that are not input files but should be processed by the
+# preprocessor.
+# This tag requires that the tag SEARCH_INCLUDES is set to YES.
+
+INCLUDE_PATH           =
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
+# patterns (like *.h and *.hpp) to filter out the header-files in the
+# directories. If left blank, the patterns specified with FILE_PATTERNS will be
+# used.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+INCLUDE_FILE_PATTERNS  =
+
+# The PREDEFINED tag can be used to specify one or more macro names that are
+# defined before the preprocessor is started (similar to the -D option of e.g.
+# gcc). The argument of the tag is a list of macros of the form: name or
+# name=definition (no spaces). If the definition and the "=" are omitted, "=1"
+# is assumed. To prevent a macro definition from being undefined via #undef or
+# recursively expanded use the := operator instead of the = operator.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+PREDEFINED             = $<JOIN:@defs@, >
+
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
+# tag can be used to specify a list of macro names that should be expanded. The
+# macro definition that is found in the sources will be used. Use the PREDEFINED
+# tag if you want to use a different macro definition that overrules the
+# definition found in the source code.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+EXPAND_AS_DEFINED      =
+
+# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor will
+# remove all references to function-like macros that are alone on a line, have
+# an all uppercase name, and do not end with a semicolon. Such function macros
+# are typically used for boiler-plate code, and will confuse the parser if not
+# removed.
+# The default value is: YES.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
+
+SKIP_FUNCTION_MACROS   = YES
+
+#---------------------------------------------------------------------------
+# Configuration options related to external references
+#---------------------------------------------------------------------------
+
+# The TAGFILES tag can be used to specify one or more tag files. For each tag
+# file the location of the external documentation should be added. The format of
+# a tag file without this location is as follows:
+# TAGFILES = file1 file2 ...
+# Adding location for the tag files is done as follows:
+# TAGFILES = file1=loc1 "file2 = loc2" ...
+# where loc1 and loc2 can be relative or absolute paths or URLs. See the
+# section "Linking to external documentation" for more information about the use
+# of tag files.
+# Note: Each tag file must have a unique name (where the name does NOT include
+# the path). If a tag file is not located in the directory in which doxygen is
+# run, you must also specify the path to the tagfile here.
+
+TAGFILES               =
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create a
+# tag file that is based on the input files it reads. See section "Linking to
+# external documentation" for more information about the usage of tag files.
+
+GENERATE_TAGFILE       =
+
+# If the ALLEXTERNALS tag is set to YES, all external class will be listed in
+# the class index. If set to NO, only the inherited external classes will be
+# listed.
+# The default value is: NO.
+
+ALLEXTERNALS           = NO
+
+# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed
+# in the modules index. If set to NO, only the current project's groups will be
+# listed.
+# The default value is: YES.
+
+EXTERNAL_GROUPS        = YES
+
+# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in
+# the related pages index. If set to NO, only the current project's pages will
+# be listed.
+# The default value is: YES.
+
+EXTERNAL_PAGES         = YES
+
+# The PERL_PATH should be the absolute path and name of the perl script
+# interpreter (i.e. the result of 'which perl').
+# The default file (with absolute path) is: /usr/bin/perl.
+
+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+
+# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram
+# (in HTML and LaTeX) for classes with base or super classes. Setting the tag to
+# NO turns the diagrams off. Note that this option also works with HAVE_DOT
+# disabled, but it is recommended to install and use dot, since it yields more
+# powerful graphs.
+# The default value is: YES.
+
+CLASS_DIAGRAMS         = YES
+
+# You can define message sequence charts within doxygen comments using the \msc
+# command. Doxygen will then run the mscgen tool (see:
+# http://www.mcternan.me.uk/mscgen/)) to produce the chart and insert it in the
+# documentation. The MSCGEN_PATH tag allows you to specify the directory where
+# the mscgen tool resides. If left empty the tool is assumed to be found in the
+# default search path.
+
+MSCGEN_PATH            =
+
+# You can include diagrams made with dia in doxygen documentation. Doxygen will
+# then run dia to produce the diagram and insert it in the documentation. The
+# DIA_PATH tag allows you to specify the directory where the dia binary resides.
+# If left empty dia is assumed to be found in the default search path.
+
+DIA_PATH               =
+
+# If set to YES the inheritance and collaboration graphs will hide inheritance
+# and usage relations if the target is undocumented or is not a class.
+# The default value is: YES.
+
+HIDE_UNDOC_RELATIONS   = YES
+
+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
+# available from the path. This tool is part of Graphviz (see:
+# http://www.graphviz.org/), a graph visualization toolkit from AT&T and Lucent
+# Bell Labs. The other options in this section have no effect if this option is
+# set to NO
+# The default value is: NO.
+
+HAVE_DOT               = @DOXYGEN_DOT_FOUND@
+
+# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
+# to run in parallel. When set to 0 doxygen will base this on the number of
+# processors available in the system. You can set it explicitly to a value
+# larger than 0 to get control over the balance between CPU load and processing
+# speed.
+# Minimum value: 0, maximum value: 32, default value: 0.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_NUM_THREADS        = 0
+
+# When you want a differently looking font in the dot files that doxygen
+# generates you can specify the font name using DOT_FONTNAME. You need to make
+# sure dot is able to find the font, which can be done by putting it in a
+# standard location or by setting the DOTFONTPATH environment variable or by
+# setting DOT_FONTPATH to the directory containing the font.
+# The default value is: Helvetica.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_FONTNAME           = Helvetica
+
+# The DOT_FONTSIZE tag can be used to set the size (in points) of the font of
+# dot graphs.
+# Minimum value: 4, maximum value: 24, default value: 10.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_FONTSIZE           = 10
+
+# By default doxygen will tell dot to use the default font as specified with
+# DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can set
+# the path where dot can find it using this tag.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_FONTPATH           =
+
+# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph for
+# each documented class showing the direct and indirect inheritance relations.
+# Setting this tag to YES will force the CLASS_DIAGRAMS tag to NO.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+CLASS_GRAPH            = YES
+
+# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
+# graph for each documented class showing the direct and indirect implementation
+# dependencies (inheritance, containment, and class references variables) of the
+# class with other documented classes.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+COLLABORATION_GRAPH    = YES
+
+# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for
+# groups, showing the direct groups dependencies.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GROUP_GRAPHS           = YES
+
+# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
+# collaboration diagrams in a style similar to the OMG's Unified Modeling
+# Language.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+UML_LOOK               = NO
+
+# If the UML_LOOK tag is enabled, the fields and methods are shown inside the
+# class node. If there are many fields or methods and many nodes the graph may
+# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the
+# number of items for each type to make the size more manageable. Set this to 0
+# for no limit. Note that the threshold may be exceeded by 50% before the limit
+# is enforced. So when you set the threshold to 10, up to 15 fields may appear,
+# but if the number exceeds 15, the total amount of fields shown is limited to
+# 10.
+# Minimum value: 0, maximum value: 100, default value: 10.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+UML_LIMIT_NUM_FIELDS   = 10
+
+# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and
+# collaboration graphs will show the relations between templates and their
+# instances.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are set to
+# YES then doxygen will generate a graph for each documented file showing the
+# direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INCLUDE_GRAPH          = YES
+
+# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are
+# set to YES then doxygen will generate a graph for each documented file showing
+# the direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INCLUDED_BY_GRAPH      = YES
+
+# If the CALL_GRAPH tag is set to YES then doxygen will generate a call
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable call graphs for selected
+# functions only using the \callgraph command. Disabling a call graph can be
+# accomplished by means of the command \hidecallgraph.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+CALL_GRAPH             = YES
+
+# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable caller graphs for selected
+# functions only using the \callergraph command. Disabling a caller graph can be
+# accomplished by means of the command \hidecallergraph.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+CALLER_GRAPH           = NO
+
+# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
+# hierarchy of all classes instead of a textual one.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GRAPHICAL_HIERARCHY    = YES
+
+# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the
+# dependencies a directory has on other directories in a graphical way. The
+# dependency relations are determined by the #include relations between the
+# files in the directories.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DIRECTORY_GRAPH        = YES
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
+# generated by dot. For an explanation of the image formats see the section
+# output formats in the documentation of the dot tool (Graphviz (see:
+# http://www.graphviz.org/)).
+# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in order
+# to make the SVG files visible in IE 9+ (other browsers do not have this
+# requirement).
+# Possible values are: png, jpg, gif, svg, png:gd, png:gd:gd, png:cairo,
+# png:cairo:gd, png:cairo:cairo, png:cairo:gdiplus, png:gdiplus and
+# png:gdiplus:gdiplus.
+# The default value is: png.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_IMAGE_FORMAT       = svg
+
+# If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
+# enable generation of interactive SVG images that allow zooming and panning.
+#
+# Note that this requires a modern browser other than Internet Explorer. Tested
+# and working are Firefox, Chrome, Safari, and Opera.
+# Note: For IE 9+ you need to set HTML_FILE_EXTENSION to xhtml in order to make
+# the SVG files visible. Older versions of IE do not have SVG support.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INTERACTIVE_SVG        = NO
+
+# The DOT_PATH tag can be used to specify the path where the dot tool can be
+# found. If left blank, it is assumed the dot tool can be found in the path.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_PATH               =
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that
+# contain dot files that are included in the documentation (see the \dotfile
+# command).
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOTFILE_DIRS           =
+
+# The MSCFILE_DIRS tag can be used to specify one or more directories that
+# contain msc files that are included in the documentation (see the \mscfile
+# command).
+
+MSCFILE_DIRS           =
+
+# The DIAFILE_DIRS tag can be used to specify one or more directories that
+# contain dia files that are included in the documentation (see the \diafile
+# command).
+
+DIAFILE_DIRS           =
+
+# When using plantuml, the PLANTUML_JAR_PATH tag should be used to specify the
+# path where java can find the plantuml.jar file. If left blank, it is assumed
+# PlantUML is not used or called during a preprocessing step. Doxygen will
+# generate a warning when it encounters a \startuml command in this case and
+# will not generate output for the diagram.
+
+PLANTUML_JAR_PATH      =
+
+# When using plantuml, the PLANTUML_CFG_FILE tag can be used to specify a
+# configuration file for plantuml.
+
+PLANTUML_CFG_FILE      =
+
+# When using plantuml, the specified paths are searched for files specified by
+# the !include statement in a plantuml block.
+
+PLANTUML_INCLUDE_PATH  =
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes
+# that will be shown in the graph. If the number of nodes in a graph becomes
+# larger than this value, doxygen will truncate the graph, which is visualized
+# by representing a node as a red box. Note that doxygen if the number of direct
+# children of the root node in a graph is already larger than
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note that
+# the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+# Minimum value: 0, maximum value: 10000, default value: 50.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_GRAPH_MAX_NODES    = 50
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the graphs
+# generated by dot. A depth value of 3 means that only nodes reachable from the
+# root by following a path via at most 3 edges will be shown. Nodes that lay
+# further from the root node will be omitted. Note that setting this option to 1
+# or 2 may greatly reduce the computation time needed for large code bases. Also
+# note that the size of a graph can be further restricted by
+# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+# Minimum value: 0, maximum value: 1000, default value: 0.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
+# background. This is disabled by default, because dot on Windows does not seem
+# to support this out of the box.
+#
+# Warning: Depending on the platform used, enabling this option may lead to
+# badly anti-aliased labels on the edges of a graph (i.e. they become hard to
+# read).
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
+# files in one run (i.e. multiple -o and -T options on the command line). This
+# makes dot run faster, but since only newer versions of dot (>1.8.10) support
+# this, this feature is disabled by default.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend page
+# explaining the meaning of the various boxes and arrows in the dot generated
+# graphs.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES, doxygen will remove the intermediate dot
+# files that are used to generate the various graphs.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_CLEANUP            = YES
diff --git a/README.md b/README.md
index e618dec..b8e3b60 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,270 @@
-# opentracing-c
\ No newline at end of file
+# opentracing-c
+
+[![Build Status](https://travis-ci.org/opentracing/opentracing-c.svg?branch=master)](https://travis-ci.org/opentracing/opentracing-c)
+[![codecov](https://codecov.io/gh/opentracing/opentracing-c/branch/master/graph/badge.svg)](https://codecov.io/gh/opentracing/opentracing-c)
+
+ANSI C implementation of the OpenTracing API http://opentracing.io.
+
+## Required Reading
+
+In order to understand the C platform API, one must first be familiar with the
+[OpenTracing project](http://opentracing.io) and
+[terminology](http://opentracing.io/documentation/pages/spec) more generally.
+
+## Doxygen
+
+API docs generated using Doxygen are hosted
+[here](opentracing.github.io/opentracing-c) on GitHub pages.
+
+## Compile and install
+
+```
+mkdir build
+cd build
+cmake ..
+make
+sudo make install
+```
+
+To test:
+
+```
+make test
+```
+
+## API overview for those adding instrumentation
+
+Everyday consumers of this `opentracing-c` package really only need to worry
+about a couple of key abstractions: the `opentracing_tracer` `start_span`
+function, the `opentracing_span` interface, and binding an `opentracing_tracer`
+at `main()`-time. Here are code snippets demonstrating some important use cases.
+
+#### Singleton initialization
+
+The simplest starting point is `opentracing-c/tracer.h`. As early as possible,
+call
+
+```c
+    #include <opentracing-c/tracer.h>
+    #include <some_tracing_impl.h>
+
+    int main()
+    {
+        opentracing_tracer* tracer;
+        tracer = make_some_tracing_impl();
+        assert(tracer != NULL);
+        opentracing_init_global_tracer(tracer);
+        ...
+    }
+```
+
+##### Non-singleton initialization
+
+If you prefer direct control to singletons, manage ownership of the
+`opentracing_tracer` implementation explicitly.
+
+#### Starting an empty trace by creating a "root span"
+
+It's always possible to create a "root" `opentracing_span` with no parent or
+other causal reference.
+
+```c
+    void xyz(void)
+    {
+        opentracing_tracer* tracer;
+        opentracing_span* span;
+        ...
+        tracer = /* Some Tracer */
+        span = tracer->start_span(tracer, "operation_name");
+        if (span == NULL) {
+            /* Error creating span. */
+            ...
+        }
+        ...
+        span->finish(span);
+        ...
+    }
+```
+
+#### Creating a (child) span given an existing (parent) span
+
+```c
+    void xyz(const opentracing_span* parent_span, ...)
+    {
+        opentracing_tracer* tracer;
+        opentracing_span* span;
+        opentracing_span_start_options options;
+        ...
+        tracer = (opentracing_tracer*) /* Some Tracer */
+        memset(options, 0, sizeof(options));
+        options.refs = parent_span;
+        options.num_refs = 1;
+        span = tracer->start_span_with_options(
+            tracer, "operation_name", &options);
+        if (span == NULL) {
+            /* Error creating span. */
+            ...
+        }
+        ...
+        /* Finishing the span operation. */
+        span->finish(span);
+        ...
+        /* Freeing the span. */
+        span->destroy((opentracing_destructible*) span);
+        ...
+    }
+```
+
+#### Inject span context into an opentracing_text_map_writer
+
+```c
+    /* Custom map implementation. */
+    typedef struct text_map text_map;
+    /* Returns opentracing_true if map initialization succeeded, false
+       otherwise. */
+    /* Returns opentracing_true if map has key, opentracing_false otherwise. */
+    opentracing_bool text_map_has_key(const text_map* map, const char* key);
+    /* Returns opentracing_true if insertion succeeded, opentracing_false
+       otherwise. */
+    opentracing_bool text_map_insert(
+        text_map* map, const char* key, const char* value);
+
+    typedef struct custom_carrier_writer {
+        /* OPENTRACINGC_TEXT_MAP_WRITER_SUBCLASS expands to the following
+           function pointer. Not using macro here for clarity. */
+        /* Returns opentracing_true on success, opentracing_false otherwise. */
+        opentracing_bool (*set)(opentracing_text_map_writer* writer,
+                   const char* key,
+                   const char* value);
+
+        text_map* map;
+    } custom_carrier_writer;
+
+    opentracing_bool custom_carrier_writer_set(
+        opentracing_text_map_writer* writer,
+        const char* key,
+        const char* value)
+    {
+        opentracing_bool success;
+        custom_carrier_writer* w;
+
+        assert(writer != NULL);
+        assert(key != NULL);
+        assert(value != NULL);
+
+        w = (custom_carrier_writer*) writer;
+        if (text_map_has_key(w->map, key) ||
+            !text_map_insert(w->map, key, value)) {
+            return opentracing_false;
+        }
+        return opentracing_true;
+    }
+
+    opentracing_bool custom_carrier_writer_init(custom_carrier_writer* writer)
+    {
+        assert(writer != NULL);
+        writer->set = &custom_carrier_writer_set;
+        return text_map_init(writer->map);
+    }
+
+    ...
+
+    custom_carrier_writer writer;
+    int return_code;
+    if (!custom_carrier_writer_init(&writer)) {
+        return;
+    }
+    return_code = tracer->inject_text_map(tracer,
+                                          (opentracing_text_map_writer*) carrier,
+                                          &span->context);
+    if (return_code != 0) {
+        /* Injection failed, log an error message. */
+        fprintf(stderr, "Injection failed, return code = %d\n", return_code);
+        return;
+    }
+```
+
+#### Extract span context from an opentracing_text_map_reader
+
+```c
+    /* See text_map struct and more of its functions above. */
+
+    /* Opaque iterator to iterate through entries in text_map. */
+    typedef struct text_map_iterator text_map_iterator;
+
+    /* Get a text_map_iterator from text_map. Returns valid iterator pointer
+       on success, NULL on failure. */
+    text_map_iterator* text_map_get_iterator(const text_map* map);
+
+    /* Destroy a text_map_iterator returned from text_map_get_iterator. */
+    void text_map_iterator_destroy(text_map_iterator* it);
+
+    /* Returns opentracing_true if there are more entries to iterate through,
+       opentracing_false otherwise. */
+    opentracing_bool text_map_iterator_has_next(const text_map_iterator* it);
+
+    /* Moves iterator to next entry, setting key pointer to next key and value
+       pointer to next value. Undefined behavior if text_map_iterator_has_next
+       returned opentracing_false (i.e. no valid entries left). */
+    void text_map_iterator_next(
+        text_map_iterator* it, const char** key_ptr, const char** value_ptr);
+
+    typedef struct custom_carrier_reader {
+        /* OPENTRACINGC_TEXT_MAP_READER_SUBCLASS expands to this function
+           pointer. Not using macro for clarity. */
+        opentracing_bool (*foreach_key)(opentracing_text_map_reader* reader,
+                                        opentracing_bool (*f)(
+                                            void*,
+                                            const char*,
+                                            const char*),
+                                        void* arg);
+        const text_map* map;
+    } custom_carrier_reader;
+
+    opentracing_bool custom_carrier_reader_foreach_key(
+        opentracing_text_map_reader* reader,
+        opentracing_bool (*f)(void*, const char*, const char*),
+        void* arg)
+    {
+        custom_carrier_reader* r;
+        text_map_iterator it;
+        const char* key;
+        const char* value;
+        opentracing_bool success;
+
+        assert(reader != NULL);
+        assert(f != NULL);
+
+        r = (custom_carrier_reader*) reader;
+        it = text_map_get_iterator(r->map);
+        if (it == NULL) {
+            /* Failed to allocate iterator. */
+            return opentracing_false;
+        }
+
+        for (; text_map_iterator_has_next(it);
+             text_map_iterator_next(it, &key, &value)) {
+            assert(key != NULL);
+            assert(value != NULL);
+            if (!f(arg, key, value)) {
+                success = opentracing_false;
+                goto cleanup;
+            }
+        }
+
+        success = opentracing_true;
+
+    cleanup:
+        text_map_iterator_destroy(it);
+        return success;
+    }
+
+    /* Initialize new reader with existing map. */
+    void custom_carrier_reader_init(
+        custom_carrier_reader* reader, const text_map* map)
+    {
+        assert(reader != NULL);
+        reader->foreach_key = &custom_carrier_reader_foreach_key;
+        reader->map = map;
+    }
+```
diff --git a/cmake/CheckAttributes.cmake b/cmake/CheckAttributes.cmake
new file mode 100644
index 0000000..95818ec
--- /dev/null
+++ b/cmake/CheckAttributes.cmake
@@ -0,0 +1,70 @@
+if(__CHECK_ATTRIBUTES)
+  return()
+endif()
+set(__CHECK_ATTRIBUTES 1)
+
+function(__check_specific_attribute specific_attribute var)
+  set(tmp_dir "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
+  try_compile(have_${specific_attribute}_attribute
+    "${tmp_dir}/${specific_attribute}_attribute_test"
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/specific_attribute_test.c"
+    COMPILE_DEFINITIONS "-DATTRIBUTE=${OPENTRACINGC_ATTRIBUTE}"
+                        "-DX=${specific_attribute}")
+
+  if(have_${specific_attribute}_attribute)
+    set(${var} ON PARENT_SCOPE)
+    message(STATUS "Checking for ${OPENTRACINGC_ATTRIBUTE}((${specific_attribute})) - Success")
+  else()
+    message(STATUS "Checking for ${OPENTRACINGC_ATTRIBUTE}((${specific_attribute})) - Failed")
+  endif()
+
+endfunction()
+
+function(__check_have_weak_symbols var)
+  __check_specific_attribute("weak" have_weak_symbols)
+
+  if(have_weak_symbols)
+    set(${var} ON PARENT_SCOPE)
+    message(STATUS "Checking for weak symbol support - Success")
+  else()
+    message(STATUS "Checking for weak symbol support - Failed")
+  endif()
+endfunction()
+
+function(__check_have_nonnull_attribute var)
+  __check_specific_attribute("nonnull" have_nonnull_attribute)
+  if(have_nonnull_attribute)
+    set(${var} ON PARENT_SCOPE)
+  endif()
+endfunction()
+
+function(check_attributes)
+  if(NOT DEFINED OPENTRACINGC_ATTRIBUTE)
+    set(tmp_dir "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
+    foreach(keyword "__attribute__" "__attribute")
+      try_compile(have_${keyword}
+        "${tmp_dir}/attribute_keyword_test"
+        "${CMAKE_CURRENT_SOURCE_DIR}/cmake/attribute_keyword_test.c"
+        COMPILE_DEFINITIONS "-DATTRIBUTE=${keyword}")
+      if(have_${keyword})
+        set(OPENTRACINGC_ATTRIBUTE "${keyword}" CACHE INTERNAL
+            "Attribute keyword")
+        break()
+      endif()
+    endforeach()
+  endif()
+
+  if(NOT OPENTRACINGC_ATTRIBUTE)
+    return()
+  endif()
+
+  __check_have_weak_symbols(have_weak_symbols)
+  if(have_weak_symbols)
+    set(OPENTRACINGC_HAVE_WEAK_SYMBOLS ON PARENT_SCOPE)
+  endif()
+
+  __check_have_nonnull_attribute(have_nonnull_attribute)
+  if(have_nonnull_attribute)
+    set(OPENTRACINGC_HAVE_NONNULL_ATTRIBUTE ON PARENT_SCOPE)
+  endif()
+endfunction()
diff --git a/cmake/CodeCoverage.cmake b/cmake/CodeCoverage.cmake
new file mode 100644
index 0000000..d4ec0a3
--- /dev/null
+++ b/cmake/CodeCoverage.cmake
@@ -0,0 +1,129 @@
+# Copyright (c) 2012 - 2017, Lars Bilke
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without
+#    specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+include(CMakeParseArguments)
+
+# Check prereqs
+find_program(LCOV_PATH lcov)
+find_program(GENHTML_PATH genhtml)
+
+if(CMAKE_C_COMPILER_ID MATCHES "GNU")
+  find_program(GCOV_PATH gcov)
+  if(NOT GCOV_PATH)
+    message(FATAL_ERROR "gcov not found! Aborting...")
+  endif()
+  set(GCOV_TOOL ${GCOV_PATH})
+elseif(CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
+  if("${CMAKE_C_COMPILER_VERSION}" VERSION_LESS 3)
+    message(FATAL_ERROR "Clang version must be 3.0.0 or greater! Aborting...")
+  endif()
+  set(extra_coverage_flags "-Qunused-arguments")
+  find_program(LLVM_COV_PATH llvm-cov)
+  if(NOT LLVM_COV_PATH)
+    message(FATAL_ERROR "llvm-cov not found! Aborting...")
+  endif()
+  set(GCOV_TOOL "${CMAKE_CURRENT_SOURCE_DIR}/scripts/llvm-gcov.sh")
+else()
+  message(FATAL_ERROR "Compiler is not gcc nor clang! Aborting...")
+endif()
+
+set(COVERAGE_COMPILER_FLAGS "${extra_coverage_flags} -g -O0 --coverage -fprofile-arcs -ftest-coverage"
+  CACHE INTERNAL "")
+
+if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+  message(WARNING "Code coverage results with an optimised (non-Debug) build may be misleading")
+endif() # NOT CMAKE_BUILD_TYPE STREQUAL "Debug"
+
+if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
+  link_libraries(gcov)
+else()
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
+endif()
+
+# Defines a target for running and collection code coverage information
+# Builds dependencies, runs the given executable and outputs reports.
+# NOTE! The executable should always have a ZERO as exit code otherwise
+# the coverage generation will not complete.
+#
+# setup_target_for_coverage(
+#     NAME testrunner_coverage              # New target name
+#     EXECUTABLE testrunner1 testrunner2    # Executable in PROJECT_BINARY_DIR
+#     DEPENDENCIES testrunner1 testrunner2  # Dependencies to build first
+# )
+function(setup_target_for_coverage)
+  set(options NONE)
+  set(oneValueArgs NAME)
+  set(multiValueArgs EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
+  cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+  if(NOT LCOV_PATH)
+    message(FATAL_ERROR "lcov not found! Aborting...")
+  endif() # NOT LCOV_PATH
+
+  if(NOT GENHTML_PATH)
+    message(FATAL_ERROR "genhtml not found! Aborting...")
+  endif() # NOT GENHTML_PATH
+
+  foreach(exe ${Coverage_EXECUTABLE})
+    list(APPEND exe_commands COMMAND ${exe})
+  endforeach()
+
+  set(LCOV_INVOKE ${LCOV_PATH} --gcov-tool "${GCOV_TOOL}")
+
+  # Setup target
+  add_custom_target(${Coverage_NAME}
+
+    # Cleanup lcov
+    COMMAND ${LCOV_INVOKE} --directory . --zerocounters
+
+    # Run tests
+    ${exe_commands}
+
+    # Capturing lcov counters and generating report
+    COMMAND ${LCOV_INVOKE} --base-directory ${CMAKE_SOURCE_DIR} --directory . --capture --output-file ${Coverage_NAME}.info --no-external
+    COMMAND ${LCOV_INVOKE} --remove ${Coverage_NAME}.info ${COVERAGE_EXCLUDES} --output-file ${Coverage_NAME}.info.cleaned
+    COMMAND ${GENHTML_PATH} --legend --demangle-cpp -o ${Coverage_NAME} ${Coverage_NAME}.info.cleaned
+    COMMAND ${CMAKE_COMMAND} -E rename ${Coverage_NAME}.info.cleaned coverage.info
+    COMMAND ${CMAKE_COMMAND} -E remove ${Coverage_NAME}.info
+
+    WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+    DEPENDS ${Coverage_DEPENDENCIES}
+    COMMENT "Resetting code coverage counters to zero.\nProcessing code coverage counters and generating report."
+  )
+
+  # Show info where to find the report
+  add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
+    COMMAND ;
+    COMMENT "Open ./${Coverage_NAME}/index.html in your browser to view the coverage report."
+  )
+endfunction() # setup_target_for_coverage
+
+function(append_coverage_compiler_flags flags_var)
+  set(${flags_var} "${${flags_var}} ${COVERAGE_COMPILER_FLAGS}" PARENT_SCOPE)
+  message(STATUS "Appending code coverage compiler flags: ${COVERAGE_COMPILER_FLAGS}")
+endfunction() # append_coverage_compiler_flags
diff --git a/cmake/Config.cmake.in b/cmake/Config.cmake.in
new file mode 100644
index 0000000..38bbde7
--- /dev/null
+++ b/cmake/Config.cmake.in
@@ -0,0 +1,4 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/@TARGETS_EXPORT_NAME@.cmake")
+check_required_components("@PROJECT_NAME@")
diff --git a/cmake/GenerateDocumentation.cmake b/cmake/GenerateDocumentation.cmake
new file mode 100644
index 0000000..5697edd
--- /dev/null
+++ b/cmake/GenerateDocumentation.cmake
@@ -0,0 +1,33 @@
+if(__GENERATE_DOCUMENTATION)
+  return()
+endif()
+set(__GENERATE_DOCUMENTATION ON)
+
+include(CMakeDependentOption)
+
+function(generate_documentation)
+  find_package(Doxygen)
+  cmake_dependent_option(OPENTRACINGC_BUILD_DOC "Build documentation" ON
+                         "DOXYGEN_EXECUTABLE" OFF)
+  if(NOT OPENTRACINGC_BUILD_DOC)
+    return()
+  endif()
+
+  get_target_property(defs opentracingc COMPILE_DEFINITIONS)
+  get_target_property(inc opentracingc INCLUDE_DIRECTORIES)
+
+  set(doxygen_out_path "${CMAKE_CURRENT_BINARY_DIR}/doc/$<CONFIG>")
+
+  file(READ "${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in" doxyfile_content)
+  string(CONFIGURE "${doxyfile_content}" doxyfile_content @ONLY)
+  file(GENERATE OUTPUT "${doxygen_out_path}/Doxyfile"
+       CONTENT "${doxyfile_content}")
+
+  add_custom_target(doc
+    COMMAND ${DOXYGEN_EXECUTABLE} "${doxygen_out_path}/Doxyfile"
+    DEPENDS "${doxygen_out_path}/Doxyfile"
+            "${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in"
+    VERBATIM
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    USES_TERMINAL)
+endfunction()
diff --git a/cmake/attribute_keyword_test.c b/cmake/attribute_keyword_test.c
new file mode 100644
index 0000000..f4134d7
--- /dev/null
+++ b/cmake/attribute_keyword_test.c
@@ -0,0 +1,9 @@
+ATTRIBUTE((unused)) void test(const char* str)
+{
+    (void) str;
+}
+
+int main(void)
+{
+    return 0;
+}
diff --git a/cmake/specific_attribute_test.c b/cmake/specific_attribute_test.c
new file mode 100644
index 0000000..b04b996
--- /dev/null
+++ b/cmake/specific_attribute_test.c
@@ -0,0 +1,9 @@
+ATTRIBUTE((X)) void test(const char* str)
+{
+    (void) str;
+}
+
+int main(void)
+{
+    return 0;
+}
diff --git a/cmake/toolchain.cmake b/cmake/toolchain.cmake
new file mode 100644
index 0000000..7f3feef
--- /dev/null
+++ b/cmake/toolchain.cmake
@@ -0,0 +1,3 @@
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_C_STANDARD 90)
+set(CMAKE_C_EXTENSIONS ON)
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..ec01d82
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,4 @@
+fixes:
+  - "build/::"
+ignore:
+  - "^test/.*$"
diff --git a/scripts/build.sh b/scripts/build.sh
new file mode 100755
index 0000000..8b7f917
--- /dev/null
+++ b/scripts/build.sh
@@ -0,0 +1,71 @@
+#!/bin/bash
+
+# Copyright (c) 2018 Uber Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Based on
+# https://github.com/codecov/example-cpp11-cmake/blob/master/run_build.sh.
+
+set -e
+
+RED='\033[0;31m'
+BLUE='\033[0;34m'
+NO_COLOR='\033[0m'
+GREEN='\033[0;32m'
+
+function error() {
+    >&2 echo -e "${RED}$1${NO_COLOR}"
+}
+
+function info() {
+    echo -e "${GREEN}$1${NO_COLOR}"
+}
+
+function working() {
+    echo -e "${BLUE}$1${NO_COLOR}"
+}
+
+function valgrind_check() {
+    valgrind --error-exitcode=1 --track-origins=yes --leak-check=full $1
+}
+
+function main() {
+    local project_dir
+    project_dir=$(git rev-parse --show-toplevel)
+    cd "$project_dir" || exit 1
+
+    mkdir -p build
+    cd build || exit 1
+    working "Building project"
+    local prefix_arg
+    prefix_arg=$1
+    prefix_arg=${prefix_arg:+"-DCMAKE_INSTALL_PREFIX=$prefix_arg"}
+    cmake -DCMAKE_BUILD_TYPE=Debug ${prefix_arg} -DOPENTRACINGC_COVERAGE=${COVERAGE:OFF} ..
+
+    if make all -j3; then
+        if valgrind_check ./tracer_test && \
+           (LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$PWD" valgrind_check ./dynamic_load_test); then
+            info "All tests compiled and passed"
+        else
+            error "Tests failed"
+            exit 1
+        fi
+    else
+        error "Failed to build project"
+        exit 1
+        exit 1
+    fi
+}
+
+main $@
diff --git a/scripts/clang-format.sh b/scripts/clang-format.sh
new file mode 100755
index 0000000..186d57b
--- /dev/null
+++ b/scripts/clang-format.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# Copyright (c) 2018 Uber Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+function main() {
+    local project_dir
+    project_dir=$(git rev-parse --show-toplevel)
+    cd "$project_dir" || exit 1
+
+    local srcs
+    srcs=$(git ls-files src | grep -E '\.(c|h)$' | grep -E -v 'protoc-gen')
+
+    local cmd
+    for src in $srcs; do
+        cmd="clang-format -i $src"
+        echo "$cmd"
+        eval "$cmd"
+    done
+}
+
+main
diff --git a/scripts/generate-doc.sh b/scripts/generate-doc.sh
new file mode 100755
index 0000000..50e67d7
--- /dev/null
+++ b/scripts/generate-doc.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Copyright (c) 2018 Uber Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+function main() {
+    local project_dir
+    project_dir=$(git rev-parse --show-toplevel)
+    cd "$project_dir/build" || exit 1
+    make doc
+}
+
+main
diff --git a/scripts/install-deps.sh b/scripts/install-deps.sh
new file mode 100755
index 0000000..c03fb77
--- /dev/null
+++ b/scripts/install-deps.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+set -e
+
+function usage() {
+    echo "usage: ${BASH_SOURCE} <prefix>" 1>&2
+}
+
+function main() {
+    local prefix
+    prefix="${BASH_ARGV[0]}"
+
+    export PKG_CONFIG_PATH="$prefix/lib/pkgconfig:$PKG_CONFIG_PATH"
+
+    if [ "x$prefix" = "x" ]; then
+        usage
+        exit 1
+    fi
+
+    mkdir -p "$prefix"
+
+    if [ ! -f "$prefix/bin/cmake" ]; then
+        if [ ! -f "cmake-3.10.0-rc5-Linux-x86_64.sh" ]; then
+            curl -L -O "https://cmake.org/files/v3.10/cmake-3.10.0-rc5-Linux-x86_64.sh"
+        fi
+        bash cmake-3.10.0-rc5-Linux-x86_64.sh --skip-license --prefix="$prefix"
+    fi
+}
+
+main
diff --git a/scripts/llvm-gcov.sh b/scripts/llvm-gcov.sh
new file mode 100755
index 0000000..309f700
--- /dev/null
+++ b/scripts/llvm-gcov.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Copyright (c) 2018 Uber Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Based on advice in
+# http://logan.tw/posts/2015/04/28/check-code-coverage-with-clang-and-lcov/.
+
+llvm-cov gcov "$@"
diff --git a/scripts/upload-coverage.sh b/scripts/upload-coverage.sh
new file mode 100755
index 0000000..c9ff77a
--- /dev/null
+++ b/scripts/upload-coverage.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Copyright (c) 2018 Uber Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+function main() {
+    local project_dir
+    project_dir=$(git rev-parse --show-toplevel)
+    cd "$project_dir" || exit 1
+
+    local gcov_tool
+    case "$CC" in
+        gcc*) gcov_tool=${CC/gcc/gcov}
+            ;;
+        *) gcov_tool="$project_dir/scripts/llvm-gcov.sh"
+            ;;
+    esac
+    find build -name '*.gcno' -exec "$gcov_tool" {} \;
+    bash <(curl -s https://codecov.io/bash) || \
+        echo "Codecov did not collect coverage reports"
+}
+
+main
diff --git a/src/opentracing-c/common.h b/src/opentracing-c/common.h
new file mode 100644
index 0000000..7c9adbe
--- /dev/null
+++ b/src/opentracing-c/common.h
@@ -0,0 +1,52 @@
+#ifndef OPENTRACINGC_COMMON_H
+#define OPENTRACINGC_COMMON_H
+
+#include <opentracing-c/config.h>
+
+#include <time.h>
+
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif /* HAVE_SYS_TIME_H */
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Boolean type. */
+typedef enum { opentracing_true = 1, opentracing_false = 0 } opentracing_bool;
+
+#ifdef OPENTRACINGC_USE_TIMESPEC
+
+typedef struct timespec opentracing_time_value;
+
+#else
+
+typedef struct opentracing_time_value {
+    time_t tv_sec;
+    long int tv_nsec;
+} opentracing_time_value;
+
+#endif /* OPENTRACINGC_USE_TIMESPEC */
+
+/**
+ * Duration type to calculate precise intervals (should use monotonic clock).
+ */
+typedef struct opentracing_duration {
+    /** Duration value. */
+    opentracing_time_value value;
+} opentracing_duration;
+
+/** Timestamp type to represent absolute time (should use system clock). */
+typedef struct opentracing_timestamp {
+    /** Timestamp value. */
+    opentracing_time_value value;
+} opentracing_timestamp;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_COMMON_H */
diff --git a/src/opentracing-c/config.h.in b/src/opentracing-c/config.h.in
new file mode 100644
index 0000000..21f96ed
--- /dev/null
+++ b/src/opentracing-c/config.h.in
@@ -0,0 +1,52 @@
+#ifndef OPENTRACINGC_CONFIG_H
+#define OPENTRACINGC_CONFIG_H
+
+#include <opentracing-c/visibility.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define OPENTRACINGC_MAJOR_VERSION @PROJECT_VERSION_MAJOR@
+#define OPENTRACINGC_MINOR_VERSION @PROJECT_VERSION_MINOR@
+#define OPENTRACINGC_PATCH_VERSION @PROJECT_VERSION_PATCH@
+#define OPENTRACINGC_VERSION_STRING "@PROJECT_VERSION@"
+
+#cmakedefine HAVE_SYS_TIME_H
+#cmakedefine OPENTRACINGC_USE_TIMESPEC
+
+#cmakedefine OPENTRACINGC_HAVE_WEAK_SYMBOLS
+#cmakedefine OPENTRACINGC_HAVE_NONNULL_ATTRIBUTE
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+#define OPENTRACINGC_WEAK @OPENTRACINGC_ATTRIBUTE@((weak))
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+
+/* Ignoring warnings because nonnull is just to help us maintain quality code.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wvariadic-macros"
+
+#ifdef OPENTRACINGC_HAVE_NONNULL_ATTRIBUTE
+
+#define OPENTRACINGC_NONNULL(...) \
+    @OPENTRACINGC_ATTRIBUTE@((nonnull(__VA_ARGS__)))
+
+#define OPENTRACINGC_NONNULL_ALL @OPENTRACINGC_ATTRIBUTE@((nonnull))
+
+#else
+
+#define OPENTRACINGC_NONNULL(...)
+#define OPENTRACINGC_NONNULL_ALL
+
+#endif /* OPENTRACINGC_HAVE_NONNULL_ATTRIBUTE */
+
+#pragma GCC diagnostic pop
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_CONFIG_H */
diff --git a/src/opentracing-c/destructible.h b/src/opentracing-c/destructible.h
new file mode 100644
index 0000000..5f54810
--- /dev/null
+++ b/src/opentracing-c/destructible.h
@@ -0,0 +1,29 @@
+#ifndef OPENTRACINGC_DESTRUCTIBLE_H
+#define OPENTRACINGC_DESTRUCTIBLE_H
+
+#include <opentracing-c/config.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * Destructible interface. Essentially the same as a virtual destructor in C++,
+ * but for C.
+ */
+typedef struct opentracing_destructible {
+    /**
+     * Destructor to clean up any resources allocated to the instance.
+     * @param destructible Destructible instance.
+     */
+    void (*destroy)(struct opentracing_destructible* destructible)
+        OPENTRACINGC_NONNULL_ALL;
+} opentracing_destructible;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_DESTRUCTIBLE_H */
diff --git a/src/opentracing-c/dynamic_load.c b/src/opentracing-c/dynamic_load.c
new file mode 100644
index 0000000..255959e
--- /dev/null
+++ b/src/opentracing-c/dynamic_load.c
@@ -0,0 +1,109 @@
+#include <opentracing-c/dynamic_load.h>
+
+#include <assert.h>
+#include <dlfcn.h>
+#include <string.h>
+
+void opentracing_library_handle_destroy(opentracing_library_handle* handle)
+{
+    if (handle == NULL) {
+        return;
+    }
+    if (handle->lib_handle == NULL) {
+        return;
+    }
+    handle->factory = NULL;
+    dlclose(handle->lib_handle);
+    handle->lib_handle = NULL;
+}
+
+opentracing_dynamic_load_error_code
+opentracing_dynamically_load_tracing_library(const char* lib,
+                                             opentracing_library_handle* handle,
+                                             char* error_buffer,
+                                             int error_buffer_length)
+{
+#define COPY_ERROR()                                                  \
+    do {                                                              \
+        if (error != NULL && error_buffer != NULL) {                  \
+            error_len = strlen(error) + 1;                            \
+            if (error_len > error_buffer_length) {                    \
+                memcpy(error_buffer, error, error_buffer_length - 1); \
+                error_buffer[error_buffer_length - 1] = '\0';         \
+            }                                                         \
+            else {                                                    \
+                memcpy(error_buffer, error, error_len);               \
+            }                                                         \
+        }                                                             \
+    } while (0)
+
+    const char* error;
+    int error_len;
+    int flags;
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+
+    opentracing_tracer_factory (*make_tracer_factory)(
+        const char*, opentracing_dynamic_load_error_code*, char*, int);
+    opentracing_dynamic_load_error_code return_code;
+
+    assert(lib != NULL);
+    assert(handle != NULL);
+    assert(error_buffer != NULL || error_buffer_length == 0);
+
+    make_tracer_factory = NULL;
+    return_code = opentracing_dynamic_load_error_code_success;
+    error = NULL;
+
+    flags = ((unsigned) RTLD_NOW) | ((unsigned) RTLD_LOCAL);
+    handle->lib_handle = dlopen(lib, flags);
+    if (handle->lib_handle == NULL) {
+        error = dlerror();
+        return_code = opentracing_dynamic_load_error_code_failure;
+        goto cleanup;
+    }
+
+    dlerror(); /* Clear any existing error. */
+    *(void**) (&make_tracer_factory) =
+        dlsym(handle->lib_handle, "opentracing_make_tracer_factory");
+    if (make_tracer_factory == NULL) {
+        error = dlerror();
+        return_code = opentracing_dynamic_load_error_code_failure;
+        goto cleanup;
+    }
+
+    handle->factory = (*make_tracer_factory)(OPENTRACINGC_VERSION_STRING,
+                                             &return_code,
+                                             error_buffer,
+                                             error_buffer_length);
+    if (return_code != 0) {
+        assert(error == NULL);
+        goto cleanup;
+    }
+
+    if (handle->factory == NULL) {
+        error = "Tracer factory is NULL, no error code specified";
+        return_code = opentracing_dynamic_load_error_code_failure;
+        goto cleanup;
+    }
+
+cleanup:
+    if (return_code != opentracing_dynamic_load_error_code_success) {
+        COPY_ERROR();
+        if (handle->lib_handle != NULL) {
+            dlclose(handle->lib_handle);
+            handle->lib_handle = NULL;
+        }
+    }
+    return return_code;
+
+#else
+
+    error = "Platform has no weak symbol support";
+    COPY_ERROR();
+    return opentracing_dynamic_load_error_code_not_supported;
+
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+
+#undef COPY_ERROR
+}
diff --git a/src/opentracing-c/dynamic_load.h b/src/opentracing-c/dynamic_load.h
new file mode 100644
index 0000000..5a895fc
--- /dev/null
+++ b/src/opentracing-c/dynamic_load.h
@@ -0,0 +1,100 @@
+#ifndef OPENTRACINGC_DYNAMIC_LOAD_H
+#define OPENTRACINGC_DYNAMIC_LOAD_H
+
+#include <opentracing-c/config.h>
+#include <opentracing-c/tracer_factory.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Error codes for dynamic loading. */
+typedef enum opentracing_dynamic_load_error_code {
+    /** Success value. */
+    opentracing_dynamic_load_error_code_success = 0,
+
+    /**
+     * Occurs when dynamically loading a tracer library fails. Possible reasons
+     * could be the library doesn't exist or it is missing the required symbols.
+     */
+    opentracing_dynamic_load_error_code_failure = -1,
+
+    /**
+     * Means dynamic loading of tracing libraries is not supported for the
+     * platform used.
+     */
+    opentracing_dynamic_load_error_code_not_supported = -2,
+
+    /**
+     * Occurs if the tracing dynamically loaded library uses an incompatible
+     * version of opentracing.
+     */
+    opentracing_dynamic_load_error_code_incompatible_library_versions = -3
+} opentracing_dynamic_load_error_code;
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+
+/**
+ * Provides a common hook that can be used to create a tracing factory from a
+ * dynamically loaded library. Users should prefer to use the function
+ * dynamically_load_tracing_library() over calling this function directly.
+ * @param opentracing_version Version of opentracing-c used by caller.
+ * @param[out] return_code Indicating success or failure.
+ * @param[out] error_buffer Buffer for potential error message.
+ * @param error_buffer_length Length of error_buffer.
+ * @return Pointer to library's tracer factory function, NULL on failure.
+ * @see opentracing_dynamically_load_tracing_library()
+ */
+opentracing_tracer_factory opentracing_make_tracer_factory(
+    const char* opentracing_version,
+    opentracing_dynamic_load_error_code* return_code,
+    char* error_buffer,
+    int error_buffer_length) OPENTRACINGC_WEAK;
+
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+
+/**
+ * Handle for maintaining ownership of dynamically loaded shared
+ * library.
+ */
+typedef struct opentracing_library_handle {
+    /** Tracer factory function. */
+    opentracing_tracer_factory factory;
+    /** Raw library handle. */
+    void* lib_handle;
+} opentracing_library_handle;
+
+/**
+ * Destroy handle to stop using this library. To avoid undefined behavior, the
+ * caller must avoid doing this until all tracers loaded from this library are
+ * also destroyed.
+ * @param handle Library handle to destroy.
+ */
+void opentracing_library_handle_destroy(opentracing_library_handle* handle);
+
+/**
+ * Dynamically loads a tracing library and returns a handle that can be used
+ * to create tracers.
+ * @param lib Shared library name.
+ * @param[out] handle Library handle that should be closed once symbol is no
+ *                    longer needed.
+ * @param[out] error_buffer Buffer for potential error message.
+ * @param error_buffer_length Length of error_buffer. If error_buffer is NULL,
+ *                            must be zero.
+ * @return opentracing_dynamic_load_error_code indicating success or failure.
+ * @see opentracing_library_handle_destroy
+ */
+opentracing_dynamic_load_error_code
+opentracing_dynamically_load_tracing_library(const char* lib,
+                                             opentracing_library_handle* handle,
+                                             char* error_buffer,
+                                             int error_buffer_length)
+    OPENTRACINGC_NONNULL(1, 2);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_DYNAMIC_LOAD_H */
diff --git a/src/opentracing-c/propagation.h b/src/opentracing-c/propagation.h
new file mode 100644
index 0000000..0620fb2
--- /dev/null
+++ b/src/opentracing-c/propagation.h
@@ -0,0 +1,187 @@
+#ifndef OPENTRACINGC_PROPAGATION_H
+#define OPENTRACINGC_PROPAGATION_H
+
+#include <opentracing-c/config.h>
+
+#include <opentracing-c/common.h>
+#include <opentracing-c/span.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Error codes for errors occurring in span context propagation. */
+typedef enum opentracing_propagation_error_code {
+    /** Success value. */
+    opentracing_propagation_error_code_success = 0,
+
+    /**
+     * Occurs when the carrier passed to extract() is valid and uncorrupted
+     * but has insufficient information to extract a span context.
+     */
+    opentracing_propagation_error_code_span_context_not_found = -2,
+
+    /**
+     * Occurs when inject is asked to operate on a span context which it is
+     * not prepared to handle (for example, since it was created by a
+     * different tracer implementation).
+     */
+    opentracing_propagation_error_code_invalid_span_context = -3,
+
+    /**
+     * Occurs when inject() or extract() implementations expect a different type
+     * of carrier than they are given.
+     */
+    opentracing_propagation_error_code_invalid_carrier = -4,
+
+    /**
+     * Occurs when the carrier passed to extract() is of the expected type but
+     * is corrupted.
+     */
+    opentracing_propagation_error_code_span_context_corrupted = -5,
+
+    /**
+     * Occurs when a propagation function encounters an unknown exception. This
+     * can represent an out-of-memory error, or any other error not covered by
+     * the other error codes.
+     */
+    opentracing_propagation_error_code_unknown = -6
+} opentracing_propagation_error_code;
+
+/**
+ * The inject carrier for the opentracing_propagation_format_text_map.
+ * With it, the caller can encode a span context for propagation as entries in a
+ * map of strings.
+ * @attention The backing store for the opentracing_text_map_writer may
+ *            contain data unrelated to span context. As such, inject() and
+ *            extract() implementations that call the
+ *            opentracing_text_map_writer and opentracing_text_map_reader
+ *            interfaces must agree on a prefix or other convention to
+ *            distinguish their own key:value pairs.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_text_map_writer {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Set a key:value pair to the carrier. Multiple calls to set() for the
+     * same key leads to undefined behavior.
+     * @param writer Writer instance.
+     * @param key String key.
+     * @param value String value.
+     * @return opentracing_propagation_error_code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*set)(
+        struct opentracing_text_map_writer* writer,
+        const char* key,
+        const char* value) OPENTRACINGC_NONNULL(1);
+} opentracing_text_map_writer;
+
+/**
+ * The extract() carrier for the opentracing_propagation_format_text_map
+ * with it, the caller can decode a propagated span context as entries in a map
+ * of strings.
+ * @attention The backing store for the opentracing_text_map_reader may
+ *            contain data unrelated to span context. As such, inject() and
+ *            extract() implementations that call the
+ *            opentracing_text_map_writer and opentracing_text_map_reader
+ *            interfaces must agree on a prefix or other convention to
+ *            distinguish their own key:value pairs.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_text_map_reader {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Returns text map contents via repeated calls to the handler function.
+     * If any call to handler returns a non-nil error, immediately returns that
+     * error. The "foreach" callback pattern reduces unnecessary copying in some
+     * cases and also allows implementations to hold locks while the map is
+     * read.
+     * @param reader Reader instance.
+     * @param handler Function to call for each key:value pair. It should accept
+     *                a key and a value as arguments and return an error code
+     *                indicating success or failure.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*foreach_key)(
+        struct opentracing_text_map_reader* reader,
+        opentracing_propagation_error_code (*handler)(
+            const char* key, const char* value)) OPENTRACINGC_NONNULL_ALL;
+} opentracing_text_map_reader;
+
+/**
+ * HTTP headers writer.
+ * @extends opentracing_text_map_writer
+ */
+typedef struct opentracing_http_headers_writer {
+    /** Base class member. */
+    opentracing_text_map_writer base;
+} opentracing_http_headers_writer;
+
+/**
+ * HTTP headers reader.
+ * @extends opentracing_text_map_reader
+ */
+typedef struct opentracing_http_headers_reader {
+    /** Base class member. */
+    opentracing_text_map_reader base;
+} opentracing_http_headers_reader;
+
+/* Forward declaration. */
+struct opentracing_tracer;
+
+/**
+ * extract() carrier for a custom format. With it, the caller can decode an
+ * opentracing_span_context from entries in a custom protocol.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_custom_carrier_reader {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Extract a span context from a custom format.
+     * @param reader Reader instance.
+     * @param tracer Tracer instance.
+     * @param[out] span_context Span context pointer to return decoded span. Set
+     *                          to NULL on propagation failure or out of memory.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*extract)(
+        struct opentracing_custom_carrier_reader* reader,
+        const struct opentracing_tracer* tracer,
+        opentracing_span_context** span_context) OPENTRACINGC_NONNULL_ALL;
+} opentracing_custom_carrier_reader;
+
+/**
+ * inject() carrier for a custom format. With it, the caller can encode an
+ * opentracing_span_context for propagation as entries in a custom protocol.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_custom_carrier_writer {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Inject a span context into a custom format.
+     * @param writer Writer instance.
+     * @param tracer Tracer instance.
+     * @param span_context Span context to encode.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*inject)(
+        struct opentracing_custom_carrier_writer* writer,
+        const struct opentracing_tracer* tracer,
+        const opentracing_span_context* span_context) OPENTRACINGC_NONNULL_ALL;
+} opentracing_custom_carrier_writer;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_PROPAGATION_H */
diff --git a/src/opentracing-c/span.h b/src/opentracing-c/span.h
new file mode 100644
index 0000000..3ea6369
--- /dev/null
+++ b/src/opentracing-c/span.h
@@ -0,0 +1,277 @@
+#ifndef OPENTRACINGC_SPAN_H
+#define OPENTRACINGC_SPAN_H
+
+#include <opentracing-c/config.h>
+#include <opentracing-c/destructible.h>
+#include <opentracing-c/value.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * Span context interface. Span context represents span state that must be
+ * propagated to descendant spans and across boundaries (e.g. trace I:D,
+ * span ID, baggage).
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_span_context {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Calls a function for each baggage item in the span context. If the
+     * function returns opentracing_false, it will not be called again, and
+     * foreach_baggage_item will return immediately.
+     * @param span_context Span context instance.
+     * @param f Callback function. Takes a user-defined argument,
+     *          the baggage key, and the baggage value.
+     * @param arg Argument to pass to callback function.
+     */
+    void (*foreach_baggage_item)(struct opentracing_span_context* span_context,
+                                 opentracing_bool (*f)(void* arg,
+                                                       const char* key,
+                                                       const char* value),
+                                 void* arg);
+} opentracing_span_context;
+
+/**
+ * Log field to represent key-value pair for a log.
+ */
+typedef struct opentracing_log_field {
+    /** Key string. Owner of log field must free upon log field destruction. */
+    char* key;
+    /** Value representation. */
+    opentracing_value value;
+} opentracing_log_field;
+
+/**
+ * Log record can be used to describe events that occur in the lifetime of a
+ * span.
+ */
+typedef struct opentracing_log_record {
+    /** Time of logged event. */
+    opentracing_timestamp timestamp;
+    /** Array of fields. */
+    opentracing_log_field* fields;
+    /** Number of fields. If fields is NULL, must be set to zero. */
+    int num_fields;
+} opentracing_log_record;
+
+typedef enum opentracing_span_reference_type {
+    /**
+     * Refers to a parent span that caused *and* somehow depends
+     * upon the new child span. Often (but not always), the parent span cannot
+     * finish until the child span does.
+     */
+    opentracing_span_reference_child_of = 1,
+
+    /**
+     * Refers to a parent span that does not depend in any way on the result of
+     * the new child span. For instance, one might use "follow from" to describe
+     * pipeline stages separated by queues, or a fire-and-forget cache insert at
+     * the tail end of a web request.
+     *
+     * A "follow from" span is part of the same logical trace as the new span:
+     * i.e., the new span is somehow caused by the work of its "follow from."
+     *
+     * All of the following could be valid timing diagrams for children that
+     * "follow from" a parent.
+     *
+     *     [-Parent Span-]  [-Child Span-]
+     *
+     *
+     *     [-Parent Span--]
+     *      [-Child Span-]
+     *
+     *
+     *     [-Parent Span-]
+     *                 [-Child Span-]
+     *
+     * See http:*opentracing.io/spec/
+     */
+    opentracing_span_reference_follows_from = 2
+} opentracing_span_reference_type;
+
+typedef struct opentracing_span_reference {
+    opentracing_span_reference_type type;
+    opentracing_span_context* referenced_context;
+} opentracing_span_reference;
+
+#define OPENTRACINGC_CHILD_OF(span_context)                  \
+    {                                                        \
+        opentracing_span_reference_child_of, &(span_context) \
+    }
+
+#define OPENTRACINGC_FOLLOWS_FROM(span_context)                  \
+    {                                                            \
+        opentracing_span_reference_follows_from, &(span_context) \
+    }
+
+typedef struct opentracing_finish_span_options {
+    /** Time span finished using monotonic clock. */
+    opentracing_duration finish_time;
+
+    /** Array of log records. */
+    const opentracing_log_record* log_records;
+
+    /**
+     * Number of log records. If log_records is NULL, num_log_records must be
+     * set to zero.
+     */
+    int num_log_records;
+} opentracing_finish_span_options;
+
+/* Forward declaration. */
+struct opentracing_tracer;
+
+/**
+ * Span interface.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_span {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Sets the end timestamp and finalizes span state.
+     *
+     * With the exception of calls to context (which are always allowed),
+     * finish must be the last call made to any span instance, and to do
+     * otherwise leads to undefined behavior.
+     *
+     * @param span Span instance.
+     * @see context
+     */
+    void (*finish)(struct opentracing_span* span) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Like finish() but with explicit control over timestamps and log data.
+     * @param span Span instance.
+     * @param options Options to override in span completion.
+     * @see finish
+     */
+    void (*finish_with_options)(struct opentracing_span* span,
+                                const opentracing_finish_span_options* options)
+        OPENTRACINGC_NONNULL(1);
+
+    /**
+     * Yields the opentracing_span_context for this span. Note that the
+     * return value of context is still valid after a call to finish, as is
+     * a call to context after a call to finish.
+     * @param span Span instance.
+     * @return Span context associated with this span.
+     * @see finish
+     */
+    opentracing_span_context* (*span_context)(struct opentracing_span* span)
+        OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Sets or changes the operation name.
+     * @param span Span instance.
+     * @param operation_name New operation name.
+     */
+    void (*set_operation_name)(struct opentracing_span* span,
+                               const char* operation_name)
+        OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Adds a tag to the span. If there is a pre-existing tag set for `key`,
+     * it is overwritten. Tag values can be numeric types, strings, or bools.
+     * The behavior of other tag value types is undefined at the OpenTracing
+     * level. If a tracing system does not know how to handle a particular
+     * value type, it may ignore the tag, but shall not panic.
+     * @param span Span instance.
+     * @param key Tag key. Value copied into new allocated string.
+     * @param value Tag value. Value copied into opentracing_value.
+     */
+    void (*set_tag)(struct opentracing_span* span,
+                    const char* key,
+                    const opentracing_value* value) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Record key:value logging data about a span.
+     * @param span Span instance.
+     * @param fields Array of log fields. Values must be copied from argument.
+     *               Caller must free fields when finished using them.
+     * @param num_fields Number of log fields.
+     * @see finish_with_options
+     */
+    void (*log_fields)(struct opentracing_span* span,
+                       const opentracing_log_field* fields,
+                       int num_fields) OPENTRACINGC_NONNULL(1);
+
+    /**
+     * Sets a key:value pair on this span and its span context that also
+     * propagates to descendants of this span. set_baggage_item() enables
+     * powerful functionality given a full-stack opentracing integration
+     * (e.g. arbitrary application data from a mobile app can make it,
+     * transparently, all the way into the depths of a storage system), and
+     * with it some powerful costs: use this feature with care.
+     * @attention set_baggage_item() will only propagate baggage items to
+     *            future causal descendants of the associated span.
+     * @attention Use this thoughtfully and with care. Every key and
+     *            value is copied into every local and remote child of the
+     *            associated span, and that can add up to a lot of network and
+     *            CPU overhead.
+     * @param span Span instance.
+     * @param key Baggage key.
+     * @param value Baggage value.
+     */
+    void (*set_baggage_item)(struct opentracing_span* span,
+                             const char* key,
+                             const char* value) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Gets the value for a baggage item given its key.
+     * @param span Span instance.
+     * @param key Baggage key.
+     * @return If baggage key found, returns baggage value, otherwise returns
+     *         empty string.
+     */
+    const char* (*baggage_item)(const struct opentracing_span* span,
+                                const char* key) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Provides access to the tracer that created this span.
+     * @param span Span instance.
+     * @return Tracer instance that created this span.
+     */
+    struct opentracing_tracer* (*tracer)(const struct opentracing_span* span)
+        OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Unique data used to identify tracing vendor span type. Necessary for
+     * tracer to cast span to vendor's type during extract().
+     * @see extract()
+     *
+     * Below is a sample of a potential tracer creating a new span with a unique
+     * type descriptor.
+     * @code{.c}
+     *     static const char* custom_span_identifier = "example_vendor";
+     *     typedef struct custom_span {
+     *          opentracing_span base;
+     *          ...
+     *     } custom_span;
+     *     custom_span span;
+     *     ((opentracing_span*) &span)->type_descriptor =
+     *         custom_span_identifier;
+     *     ((opentracing_span*) &span)->type_descriptor_length =
+     *         strlen(custom_span_identifier) + 1;
+     * @endcode
+     */
+    const void* type_descriptor;
+
+    /**
+     * Number of bytes the type descriptor occupies in memory.
+     */
+    unsigned int type_descriptor_length;
+} opentracing_span;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_SPAN_H */
diff --git a/src/opentracing-c/tracer.c b/src/opentracing-c/tracer.c
new file mode 100644
index 0000000..2dd09ba
--- /dev/null
+++ b/src/opentracing-c/tracer.c
@@ -0,0 +1,244 @@
+#include <opentracing-c/tracer.h>
+
+#include <assert.h>
+
+static void noop_destroy(opentracing_destructible* destructible)
+{
+    (void) destructible;
+}
+
+#define NOOP_DESTRUCTIBLE_INIT \
+    {                          \
+        &noop_destroy          \
+    }
+
+static void noop_foreach_baggage_item(opentracing_span_context* span_context,
+                                      opentracing_bool (*f)(void*,
+                                                            const char*,
+                                                            const char*),
+                                      void* arg)
+{
+    (void) span_context;
+    (void) f;
+    (void) arg;
+}
+
+static opentracing_span_context noop_span_context_singleton = {
+    NOOP_DESTRUCTIBLE_INIT, &noop_foreach_baggage_item};
+
+typedef struct noop_span {
+    opentracing_span base;
+    opentracing_tracer* tracer_ptr;
+} noop_span;
+
+static void
+noop_span_finish_with_options(opentracing_span* span,
+                              const opentracing_finish_span_options* options)
+{
+    (void) span;
+    (void) options;
+    (void) span;
+}
+
+static void noop_span_finish(opentracing_span* span)
+{
+    span->finish_with_options(span, NULL);
+}
+
+static opentracing_span_context* noop_span_span_context(opentracing_span* span)
+{
+    (void) span;
+    return &noop_span_context_singleton;
+}
+
+static void noop_span_set_operation_name(opentracing_span* span,
+                                         const char* operation_name)
+{
+    (void) span;
+    (void) operation_name;
+}
+
+static void noop_span_set_tag(opentracing_span* span,
+                              const char* key,
+                              const opentracing_value* value)
+{
+    (void) span;
+    (void) key;
+    (void) value;
+}
+
+static void noop_span_log_fields(opentracing_span* span,
+                                 const opentracing_log_field* fields,
+                                 int num_fields)
+{
+    (void) span;
+    (void) fields;
+    (void) num_fields;
+}
+
+static void noop_span_set_baggage_item(opentracing_span* span,
+                                       const char* key,
+                                       const char* value)
+{
+    (void) span;
+    (void) key;
+    (void) value;
+}
+
+static const char* empty_str = "";
+
+static const char* noop_span_baggage_item(const opentracing_span* span,
+                                          const char* key)
+{
+    (void) span;
+    (void) key;
+    return empty_str;
+}
+
+static opentracing_tracer* noop_span_tracer(const opentracing_span* span)
+{
+    assert(span != NULL);
+    return ((const noop_span*) span)->tracer_ptr;
+}
+
+#define NOOP_SPAN_INIT                   \
+    {                                    \
+        {NOOP_DESTRUCTIBLE_INIT,         \
+         &noop_span_finish,              \
+         &noop_span_finish_with_options, \
+         &noop_span_span_context,        \
+         &noop_span_set_operation_name,  \
+         &noop_span_set_tag,             \
+         &noop_span_log_fields,          \
+         &noop_span_set_baggage_item,    \
+         &noop_span_baggage_item,        \
+         &noop_span_tracer,              \
+         NULL,                           \
+         0},                             \
+            NULL                         \
+    }
+
+static noop_span noop_span_singleton = NOOP_SPAN_INIT;
+
+static void noop_tracer_close(opentracing_tracer* tracer)
+{
+    (void) tracer;
+}
+
+static opentracing_span* noop_tracer_start_span_with_options(
+    opentracing_tracer* tracer,
+    const char* operation_name,
+    const opentracing_start_span_options* options)
+{
+    noop_span* span;
+    (void) tracer;
+    (void) operation_name;
+    (void) options;
+    span = &noop_span_singleton;
+    if (span->tracer_ptr != tracer) {
+        span->tracer_ptr = tracer;
+    }
+    return (opentracing_span*) span;
+}
+
+static opentracing_span* noop_tracer_start_span(opentracing_tracer* tracer,
+                                                const char* operation_name)
+{
+    return tracer->start_span_with_options(tracer, operation_name, NULL);
+}
+
+#define INJECT(writer_type)                                \
+    static opentracing_propagation_error_code              \
+        noop_tracer_inject_##writer_type(                  \
+            opentracing_tracer* tracer,                    \
+            opentracing_##writer_type##_writer* carrier,   \
+            const opentracing_span_context* span_context)  \
+    {                                                      \
+        (void) tracer;                                     \
+        (void) carrier;                                    \
+        (void) span_context;                               \
+        return opentracing_propagation_error_code_success; \
+    }
+
+INJECT(text_map)
+INJECT(http_headers)
+INJECT(custom_carrier)
+
+#undef INJECT
+
+static opentracing_propagation_error_code
+noop_tracer_inject_binary(opentracing_tracer* tracer,
+                          int (*callback)(void*, const char*, size_t),
+                          void* arg,
+                          const opentracing_span_context* span_context)
+{
+    (void) tracer;
+    (void) callback;
+    (void) arg;
+    (void) span_context;
+    return opentracing_propagation_error_code_success;
+}
+
+#define EXTRACT(reader_type)                               \
+    static opentracing_propagation_error_code              \
+        noop_tracer_extract_##reader_type(                 \
+            opentracing_tracer* tracer,                    \
+            opentracing_##reader_type##_reader* carrier,   \
+            opentracing_span_context** span_context)       \
+    {                                                      \
+        (void) tracer;                                     \
+        (void) carrier;                                    \
+        assert(span_context != NULL);                      \
+        *span_context = &noop_span_context_singleton;      \
+        return opentracing_propagation_error_code_success; \
+    }
+
+EXTRACT(text_map)
+EXTRACT(http_headers)
+EXTRACT(custom_carrier)
+
+#undef EXTRACT
+
+static opentracing_propagation_error_code
+noop_tracer_extract_binary(opentracing_tracer* tracer,
+                           int (*callback)(void*, char*, size_t),
+                           void* arg,
+                           opentracing_span_context** span_context)
+{
+    (void) tracer;
+    (void) callback;
+    (void) arg;
+    assert(span_context != NULL);
+    *span_context = &noop_span_context_singleton;
+    return opentracing_propagation_error_code_success;
+}
+
+#define NOOP_TRACER_INIT                                                      \
+    {                                                                         \
+        NOOP_DESTRUCTIBLE_INIT, &noop_tracer_close, &noop_tracer_start_span,  \
+            &noop_tracer_start_span_with_options,                             \
+            &noop_tracer_inject_text_map, &noop_tracer_inject_http_headers,   \
+            &noop_tracer_inject_binary, &noop_tracer_inject_custom_carrier,   \
+            &noop_tracer_extract_text_map, &noop_tracer_extract_http_headers, \
+            &noop_tracer_extract_binary, &noop_tracer_extract_custom_carrier  \
+    }
+
+static opentracing_tracer noop_tracer_singleton = NOOP_TRACER_INIT;
+static opentracing_tracer* global_tracer = &noop_tracer_singleton;
+
+opentracing_tracer* opentracing_global_tracer(void)
+{
+    return global_tracer;
+}
+
+void opentracing_init_global_tracer(opentracing_tracer* tracer)
+{
+    assert(tracer != NULL);
+    assert(global_tracer != NULL);
+    if (global_tracer == tracer) {
+        return;
+    }
+    ((opentracing_destructible*) global_tracer)
+        ->destroy((opentracing_destructible*) global_tracer);
+    global_tracer = tracer;
+}
diff --git a/src/opentracing-c/tracer.h b/src/opentracing-c/tracer.h
new file mode 100644
index 0000000..219d082
--- /dev/null
+++ b/src/opentracing-c/tracer.h
@@ -0,0 +1,255 @@
+#ifndef OPENTRACINGC_TRACER_H
+#define OPENTRACINGC_TRACER_H
+
+#include <opentracing-c/config.h>
+#include <opentracing-c/propagation.h>
+#include <opentracing-c/span.h>
+#include <opentracing-c/visibility.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Simple tag representation. */
+typedef struct opentracing_tag {
+    /** String key. */
+    char* key;
+    /** Generic value type. */
+    opentracing_value value;
+} opentracing_tag;
+
+/** Options used when calling start_span_with_options(). */
+typedef struct opentracing_start_span_options {
+    /**
+     * Start time using monotonic clock.
+     */
+    opentracing_duration start_time_steady;
+
+    /**
+     * Start time using realtime clock.
+     */
+    opentracing_timestamp start_time_system;
+
+    /**
+     * Array of references. May be NULL.
+     */
+    const opentracing_span_reference* references;
+
+    /**
+     * Number of references in array. If references is NULL, num_references
+     * must be zero.
+     */
+    int num_references;
+
+    /**
+     * Array of tags. May be NULL.
+     */
+    const opentracing_tag* tags;
+
+    /**
+     * Number of tags in array. If tags is NULL, num_tags must be zero.
+     */
+    int num_tags;
+} opentracing_start_span_options;
+
+/**
+ * Tracer interface.
+ * @extends opentracing_destructible
+ */
+typedef struct opentracing_tracer {
+    /** Base class member. */
+    opentracing_destructible base;
+
+    /**
+     * Close the tracer. This may do nothing, flush pending spans, or whatever
+     * else a tracing implementation decides close should mean. If not called
+     * before the destruction of the tracer, the tracer must perform the
+     * equivalent of close upon destruction.
+     * @attention The main distinction between close and destroy is whether or
+     *            not the tracer is in a valid state after the call.
+     *            Upon destruction, subsequent use of a tracer may result in
+     *            undefined behavior (i.e. members may be set to NULL causing
+     *            deference of NULL member). However, after close, the tracer
+     *            must not remain in an undefined state.
+     *
+     * @param tracer Tracer instance.
+     */
+    void (*close)(struct opentracing_tracer* tracer) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Equivalent to calling start_span_with_options with options as NULL.
+     * @param tracer Tracer instance.
+     * @param operation_name Name of operation associated with span.
+     * @return Span pointer on success, NULL otherwise.
+     */
+    opentracing_span* (*start_span)(struct opentracing_tracer* tracer,
+                                    const char* operation_name)
+        OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Start a new span with provided options.
+     * @param tracer Tracer instance.
+     * @param operation_name Name of operation associated with span.
+     * @param options Options to override default span initialization values.
+     * @return Span pointer on success, NULL otherwise.
+     */
+    opentracing_span* (*start_span_with_options)(
+        struct opentracing_tracer* tracer,
+        const char* operation_name,
+        const opentracing_start_span_options* options) OPENTRACINGC_NONNULL(1,
+                                                                            2);
+
+    /**
+     * Inject span context into text map carrier.
+     * @param tracer Tracer instance.
+     * @param carrier Text map carrier.
+     * @param span_context Span context to serialize to carrier.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*inject_text_map)(
+        struct opentracing_tracer* tracer,
+        opentracing_text_map_writer* carrier,
+        const opentracing_span_context* span_context) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Inject span context into HTTP headers carrier.
+     * @param tracer Tracer instance.
+     * @param carrier HTTP headers carrier.
+     * @param span_context Span context to serialize to carrier.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*inject_http_headers)(
+        struct opentracing_tracer* tracer,
+        opentracing_http_headers_writer* carrier,
+        const opentracing_span_context* span_context) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Inject span context into binary carrier.
+     * @param tracer Tracer instance.
+     * @param callback Binary carrier callback. Passed a user-defined argument,
+     *                 the binary data chunk, and the length of the binary data
+     *                 chunk. May be called multiple times in a row to write
+     *                 entire span context. Return non-zero to indicate write
+     *                 error.
+     * @param arg Binary carrier callback argument.
+     * @param span_context Span context to serialize to carrier.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*inject_binary)(
+        struct opentracing_tracer* tracer,
+        int (*callback)(void*, const char*, size_t),
+        void* arg,
+        const opentracing_span_context* span_context)
+        OPENTRACINGC_NONNULL(1, 2, 4);
+
+    /**
+     * Inject span context into custom carrier.
+     * @param tracer Tracer instance.
+     * @param carrier Custom carrier.
+     * @param span_context Span context to serialize to carrier.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*inject_custom)(
+        struct opentracing_tracer* tracer,
+        opentracing_custom_carrier_writer* carrier,
+        const opentracing_span_context* span_context) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Extract span context from carrier.
+     * @note If the tracer cannot allocate a span, it should return the
+     *       opentracing_propagation_error_code_unknown error code and set
+     *       span_context to NULL.
+     * @param tracer Tracer instance.
+     * @param carrier Text map carrier.
+     * @param[out] span_context Span context pointer to return decoded span.
+     *                          Set to NULL on propagation failure or out of
+     *                          memory.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*extract_text_map)(
+        struct opentracing_tracer* tracer,
+        opentracing_text_map_reader* carrier,
+        opentracing_span_context** span_context) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Extract span context from carrier.
+     * @note If the tracer cannot allocate a span, it should return the
+     *       opentracing_propagation_error_code_unknown error code and set
+     *       span_context to NULL.
+     * @param tracer Tracer instance.
+     * @param carrier HTTP headers carrier.
+     * @param[out] span_context Span context pointer to return decoded span.
+     *                          Set to NULL on propagation failure or out of
+     *                          memory.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*extract_http_headers)(
+        struct opentracing_tracer* tracer,
+        opentracing_http_headers_reader* carrier,
+        opentracing_span_context** span_context) OPENTRACINGC_NONNULL_ALL;
+
+    /**
+     * Extract span context from carrier.
+     * @note If the tracer cannot allocate a span, it should return the
+     *       opentracing_propagation_error_code_unknown error code and set
+     *       span_context to NULL.
+     * @param tracer Tracer instance.
+     * @param callback Binary carrier callback. Passed user-defined argument,
+     *                 data buffer, and data buffer length. May be called
+     *                 multiple times to provide data from binary stream. Must
+     *                 return number of bytes read, with a negative number
+     *                 indicating an error, and zero indicating end of stream.
+     * @param arg Binary carrier callback argument.
+     * @param[out] span_context Span context pointer to return decoded span.
+     *                          Set to NULL on propagation failure or out of
+     *                          memory.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*extract_binary)(
+        struct opentracing_tracer* tracer,
+        int (*callback)(void*, char*, size_t),
+        void* arg,
+        opentracing_span_context** span_context) OPENTRACINGC_NONNULL(1, 2, 4);
+
+    /**
+     * Extract span context from carrier.
+     * @note If the tracer cannot allocate a span, it should return the
+     *       opentracing_propagation_error_code_unknown error code and set
+     *       span_context to NULL.
+     * @param tracer Tracer instance.
+     * @param carrier Custom carrier.
+     * @param[out] span_context Span context pointer to return decoded span.
+     *                          Set to NULL on propagation failure or out of
+     *                          memory.
+     * @return Error code indicating success or failure.
+     */
+    opentracing_propagation_error_code (*extract_custom)(
+        struct opentracing_tracer* tracer,
+        opentracing_custom_carrier_reader* carrier,
+        opentracing_span_context** span_context) OPENTRACINGC_NONNULL_ALL;
+} opentracing_tracer;
+
+/**
+ * Get the tracer singleton. At process start, set to a no-op tracer.
+ * @return Global tracer instance.
+ * @attention Do not modify members.
+ * @see opentracing_init_global_tracer()
+ */
+OPENTRACINGC_EXPORT opentracing_tracer* opentracing_global_tracer(void);
+
+/**
+ * Install a global tracer. Ideally, only called once. Good candidate for use
+ * of pthread_once.
+ * @param tracer New global tracer instance.
+ * @see opentracing_global_tracer()
+ */
+OPENTRACINGC_EXPORT void opentracing_init_global_tracer(
+    opentracing_tracer* tracer) OPENTRACINGC_NONNULL_ALL;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_TRACER_H */
diff --git a/src/opentracing-c/tracer_factory.h b/src/opentracing-c/tracer_factory.h
new file mode 100644
index 0000000..2e8f5eb
--- /dev/null
+++ b/src/opentracing-c/tracer_factory.h
@@ -0,0 +1,33 @@
+#ifndef OPENTRACINGC_TRACER_FACTORY_H
+#define OPENTRACINGC_TRACER_FACTORY_H
+
+#include <opentracing-c/config.h>
+
+#include <opentracing-c/common.h>
+#include <opentracing-c/tracer.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * opentracing_tracer_factory interface to encapsulate vendor tracing libraries.
+ * @param config Configuration string to pass to tracer.
+ * @param[out] tracer Storage for new tracer instance pointer.
+ * @param[out] error_buffer Buffer for potential error message.
+ * @param error_buffer_length Length of error_buffer.
+ * @return opentracing_true on success, opentracing_false otherwise.
+ */
+typedef opentracing_bool (*opentracing_tracer_factory)(
+    const char* config,
+    opentracing_tracer** tracer,
+    char* error_buffer,
+    int error_buffer_length);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_TRACER_FACTORY_H */
diff --git a/src/opentracing-c/value.h b/src/opentracing-c/value.h
new file mode 100644
index 0000000..b09659b
--- /dev/null
+++ b/src/opentracing-c/value.h
@@ -0,0 +1,59 @@
+#ifndef OPENTRACINGC_VALUE_H
+#define OPENTRACINGC_VALUE_H
+
+#include <stdint.h>
+
+#include <opentracing-c/common.h>
+#include <opentracing-c/config.h>
+
+/** @file */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * Value types.
+ */
+typedef enum opentracing_value_type {
+    opentracing_value_bool,
+    opentracing_value_double,
+    opentracing_value_int64,
+    opentracing_value_uint64,
+    opentracing_value_string,
+    opentracing_value_null
+} opentracing_value_type;
+
+/**
+ * Tagged union that can represent a number of value types.
+ */
+typedef struct opentracing_value {
+    /** Value type. */
+    opentracing_value_type type;
+    /** Value storage. */
+    union {
+        /** Storage for Boolean value. */
+        opentracing_bool bool_value;
+        /** Storage for double value. */
+        double double_value;
+        /** Storage for 64 bit signed integer value. */
+        int64_t int64_value;
+        /** Storage for 64 bit unsigned integer value. */
+        uint64_t uint64_value;
+        /** Storage for string value. Must be freed when no longer in use. */
+        char* string_value;
+    } value;
+} opentracing_value;
+
+/**
+ * @note To avoid memory allocation in the opentracing-c interface, no
+ *       initializer or destructor is defined here for opentracing_value
+ *       (relevant for strings), but they should be fairly straightforward to
+ *       implement.
+ */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* OPENTRACINGC_VALUE_H */
diff --git a/test/dynamic_load_test.c b/test/dynamic_load_test.c
new file mode 100644
index 0000000..b2f9baf
--- /dev/null
+++ b/test/dynamic_load_test.c
@@ -0,0 +1,74 @@
+#include <assert.h>
+#include <string.h>
+
+#include <opentracing-c/dynamic_load.h>
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+#include "mock_tracing_lib_names.h"
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+
+int main(void)
+{
+    opentracing_library_handle handle;
+    char error[256];
+    opentracing_dynamic_load_error_code error_code;
+
+    opentracing_library_handle_destroy(NULL);
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+    opentracing_tracer* tracer;
+    tracer = NULL;
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+
+    memset(&handle, 0, sizeof(handle));
+    memset(&error, 0, sizeof(error));
+    opentracing_library_handle_destroy(&handle);
+
+    error_code = opentracing_dynamically_load_tracing_library(
+        "libdoesnotexist.so", &handle, error, sizeof(error));
+
+#ifdef OPENTRACINGC_HAVE_WEAK_SYMBOLS
+
+    assert(error_code == opentracing_dynamic_load_error_code_failure);
+    assert(handle.factory == NULL);
+    assert(handle.lib_handle == NULL);
+
+    error_code = opentracing_dynamically_load_tracing_library(
+        MOCK_TRACING_LIB_NO_HOOK_NAME, &handle, error, sizeof(error));
+    assert(error_code == opentracing_dynamic_load_error_code_failure);
+    assert(handle.factory == NULL);
+    assert(handle.lib_handle == NULL);
+
+    error_code = opentracing_dynamically_load_tracing_library(
+        MOCK_TRACING_LIB_BAD_VERSION_NAME, &handle, error, sizeof(error));
+    assert(error_code ==
+           opentracing_dynamic_load_error_code_incompatible_library_versions);
+    assert(handle.factory == NULL);
+    assert(handle.lib_handle == NULL);
+
+    error_code = opentracing_dynamically_load_tracing_library(
+        MOCK_TRACING_LIB_HOOK_RETURNS_NULL_NAME, &handle, error, sizeof(error));
+    assert(error_code == opentracing_dynamic_load_error_code_failure);
+    assert(handle.factory == NULL);
+    assert(handle.lib_handle == NULL);
+
+    error_code = opentracing_dynamically_load_tracing_library(
+        MOCK_TRACING_LIB_NAME, &handle, error, sizeof(error));
+    assert(error_code == opentracing_dynamic_load_error_code_success);
+    assert(handle.factory != NULL);
+    assert(handle.lib_handle != NULL);
+    assert((*handle.factory)("", &tracer, error, sizeof(error)) ==
+           opentracing_true);
+    ((opentracing_destructible*) tracer)
+        ->destroy((opentracing_destructible*) tracer);
+    opentracing_library_handle_destroy(&handle);
+
+#else
+
+    assert(error_code == opentracing_dynamic_load_error_code_not_supported);
+    assert(handle.factory == NULL);
+    assert(handle.lib_handle == NULL);
+
+#endif /* OPENTRACINGC_HAVE_WEAK_SYMBOLS */
+    return 0;
+}
diff --git a/test/mock_tracing_lib.c b/test/mock_tracing_lib.c
new file mode 100644
index 0000000..d56187f
--- /dev/null
+++ b/test/mock_tracing_lib.c
@@ -0,0 +1,54 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <opentracing-c/dynamic_load.h>
+
+opentracing_bool mock_tracer_factory(const char* config,
+                                     opentracing_tracer** tracer,
+                                     char* error_buffer,
+                                     int error_buffer_length)
+{
+    (void) config;
+    (void) error_buffer;
+    (void) error_buffer_length;
+    assert(tracer != NULL);
+    *tracer = opentracing_global_tracer();
+    return opentracing_true;
+}
+
+#ifdef BAD_VERSION
+#define OPENTRACINGC_VERSION_COMPAT "0.0.0"
+#else
+#define OPENTRACINGC_VERSION_COMPAT OPENTRACINGC_VERSION_STRING
+#endif /* OPENTRACINGC_BAD_VERSION */
+
+#ifdef DEFINE_HOOK
+
+opentracing_tracer_factory opentracing_make_tracer_factory(
+    const char* opentracing_version,
+    opentracing_dynamic_load_error_code* return_code,
+    char* error_buffer,
+    int error_buffer_length)
+{
+    assert(return_code != NULL);
+    if (strcmp(opentracing_version, OPENTRACINGC_VERSION_COMPAT) != 0) {
+        snprintf(error_buffer,
+                 error_buffer_length,
+                 "Tracer expected opentracing-c version %s, called with %s",
+                 OPENTRACINGC_VERSION_STRING,
+                 opentracing_version);
+        *return_code =
+            opentracing_dynamic_load_error_code_incompatible_library_versions;
+        return NULL;
+    }
+
+#ifdef RETURN_NULL_NO_ERROR
+    return NULL;
+#else
+    *return_code = opentracing_dynamic_load_error_code_success;
+    return &mock_tracer_factory;
+#endif /* RETURN_NULL_NO_ERROR */
+}
+
+#endif /* DEFINE_HOOK */
diff --git a/test/mock_tracing_lib_names.h.in b/test/mock_tracing_lib_names.h.in
new file mode 100644
index 0000000..610af3a
--- /dev/null
+++ b/test/mock_tracing_lib_names.h.in
@@ -0,0 +1,12 @@
+#ifndef MOCK_TRACING_LIB_NAMES_H
+#define MOCK_TRACING_LIB_NAMES_H
+
+#define MOCK_TRACING_LIB_NAME "$<TARGET_SONAME_FILE_NAME:mock_tracing_lib>"
+#define MOCK_TRACING_LIB_NO_HOOK_NAME \
+    "$<TARGET_SONAME_FILE_NAME:mock_tracing_lib_no_hook>"
+#define MOCK_TRACING_LIB_BAD_VERSION_NAME \
+    "$<TARGET_SONAME_FILE_NAME:mock_tracing_lib_bad_version>"
+#define MOCK_TRACING_LIB_HOOK_RETURNS_NULL_NAME \
+    "$<TARGET_SONAME_FILE_NAME:mock_tracing_lib_hook_return_null>"
+
+#endif /* MOCK_TRACING_LIB_NAMES_H */
diff --git a/test/tracer_test.c b/test/tracer_test.c
new file mode 100644
index 0000000..4341c12
--- /dev/null
+++ b/test/tracer_test.c
@@ -0,0 +1,163 @@
+#include <assert.h>
+#include <string.h>
+
+#include <opentracing-c/tracer.h>
+
+static void null_destroy(opentracing_destructible* destructible)
+{
+    (void) destructible;
+}
+
+static opentracing_bool callback(void* arg, const char* key, const char* value)
+{
+    (void) key;
+    (void) value;
+    assert(arg != NULL);
+    int* counter = (int*) arg;
+    counter++;
+    return opentracing_true;
+}
+
+typedef struct mock_text_map_reader {
+    opentracing_text_map_reader base;
+} mock_text_map_reader;
+
+typedef struct mock_text_map_writer {
+    opentracing_text_map_writer base;
+} mock_text_map_writer;
+
+typedef struct mock_http_headers_reader {
+    opentracing_http_headers_reader base;
+} mock_http_headers_reader;
+
+typedef struct mock_http_headers_writer {
+    opentracing_http_headers_writer base;
+} mock_http_headers_writer;
+
+typedef struct mock_custom_reader {
+    opentracing_custom_carrier_reader base;
+} mock_custom_reader;
+
+typedef struct mock_custom_writer {
+    opentracing_custom_carrier_writer base;
+} mock_custom_writer;
+
+static int
+mock_binary_reader_callback(void* arg, char* buffer, size_t buffer_len)
+{
+    (void) arg;
+    (void) buffer;
+    (void) buffer_len;
+    return 0;
+}
+
+static int mock_binary_write_callback(void* arg, const char* data, size_t len)
+{
+    (void) arg;
+    (void) data;
+    (void) len;
+    return 0;
+}
+
+int main(void)
+{
+    opentracing_tracer* tracer;
+    opentracing_span* span;
+    opentracing_span_context* span_context;
+    int return_code;
+    opentracing_value value;
+    opentracing_tracer* global_tracer;
+    opentracing_tracer dummy_tracer;
+    int counter;
+    mock_text_map_reader text_map_reader;
+    mock_text_map_writer text_map_writer;
+    mock_http_headers_reader http_headers_reader;
+    mock_http_headers_writer http_headers_writer;
+    mock_custom_reader custom_reader;
+    mock_custom_writer custom_writer;
+
+    memset(&text_map_reader, 0, sizeof(text_map_reader));
+    memset(&text_map_writer, 0, sizeof(text_map_writer));
+    memset(&http_headers_reader, 0, sizeof(http_headers_reader));
+    memset(&http_headers_writer, 0, sizeof(http_headers_writer));
+    memset(&custom_reader, 0, sizeof(custom_reader));
+    memset(&custom_writer, 0, sizeof(custom_writer));
+
+    tracer = opentracing_global_tracer();
+    span = tracer->start_span(tracer, "a");
+    assert(span != NULL);
+    span_context = span->span_context(span);
+    assert(span_context != NULL);
+    counter = 0;
+    span_context->foreach_baggage_item(
+        span_context, &callback, (void*) &counter);
+    assert(counter == 0);
+    assert(span->tracer(span) == tracer);
+    assert(strlen(span->baggage_item(span, "key")) == 0);
+    span->set_baggage_item(span, "key", "value");
+    span->set_tag(span, "tag", &value);
+    span->set_operation_name(span, "operation");
+    span->log_fields(span, NULL, 0);
+
+    span->finish(span);
+    ((opentracing_destructible*) span)
+        ->destroy((opentracing_destructible*) span);
+
+    return_code = tracer->extract_text_map(
+        tracer, (opentracing_text_map_reader*) &text_map_reader, &span_context);
+    assert(return_code == 0);
+    assert(span_context != NULL);
+    return_code = tracer->inject_text_map(
+        tracer, (opentracing_text_map_writer*) &text_map_writer, span_context);
+    ((opentracing_destructible*) span_context)
+        ->destroy((opentracing_destructible*) span_context);
+
+    return_code = tracer->extract_http_headers(
+        tracer,
+        (opentracing_http_headers_reader*) &http_headers_reader,
+        &span_context);
+    assert(return_code == 0);
+    assert(span_context != NULL);
+    return_code = tracer->inject_http_headers(
+        tracer,
+        (opentracing_http_headers_writer*) &http_headers_writer,
+        span_context);
+    ((opentracing_destructible*) span_context)
+        ->destroy((opentracing_destructible*) span_context);
+
+    return_code = tracer->extract_custom(
+        tracer,
+        (opentracing_custom_carrier_reader*) &custom_reader,
+        &span_context);
+    assert(return_code == 0);
+    assert(span_context != NULL);
+    return_code = tracer->inject_custom(
+        tracer,
+        (opentracing_custom_carrier_writer*) &custom_writer,
+        span_context);
+    ((opentracing_destructible*) span_context)
+        ->destroy((opentracing_destructible*) span_context);
+
+    return_code = tracer->extract_binary(
+        tracer, &mock_binary_reader_callback, NULL, &span_context);
+    assert(return_code == 0);
+    assert(span_context != NULL);
+    return_code = tracer->inject_binary(
+        tracer, &mock_binary_write_callback, NULL, span_context);
+    ((opentracing_destructible*) span_context)
+        ->destroy((opentracing_destructible*) span_context);
+
+    opentracing_init_global_tracer(opentracing_global_tracer());
+
+    global_tracer = opentracing_global_tracer();
+    memset(&dummy_tracer, 0, sizeof(dummy_tracer));
+    dummy_tracer.base.destroy = &null_destroy;
+    opentracing_init_global_tracer(&dummy_tracer);
+    assert(opentracing_global_tracer() == &dummy_tracer);
+    opentracing_init_global_tracer(global_tracer);
+    assert(opentracing_global_tracer() == global_tracer);
+
+    global_tracer->close(global_tracer);
+
+    return 0;
+}